Dell 100-Mbps Network Card User Manual

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®
Information in this document is subject to change without notice.
 1996
Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell, the DELL logo, and OptiPlex are registered trademarks of Dell Computer Corporation; Intel and Pentium are registered trademarks
of Intel Corporation; Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation; Novell and NetWare are registered trademarks
of Novell, Inc.; IBM is a registered trademark of International Business Machines Corporation; 3Com is a registered trademark of 3Com Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Computer
Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
December 1996
P/N 84577
Contents
Chapter 1
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Dual-Processor Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Advanced Expansion Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Hard-Disk Drive Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Enhanced Dual-Interface EIDE Subsystem . . . . . . . . . . . . . . . . . . . . . . . 1-6
Audio Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
PCI Video Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
NIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
USB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Desktop Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Thermal Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
System Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
System Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Pin Assignments for the DC Power Connectors . . . . . . . . . . . . . . . . . 1-8
DC Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
System Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Video Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Main Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
System Board Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Interrupt Assignments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
DMA Channel Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
v
Chapter 2
Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Initial User Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Observing the Boot Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Eliminating Resource Conflicts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running the Diskette-Based Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1
2-2
2-3
2-4
2-5
2-5
2-6
Chapter 3
Beep Codes and Error Messages . . . . . . . . . . . . . . . . . . 3-1
POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Chapter 4
Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Precautionary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Floor Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
System Unit Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Eject, Power, and Reset Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Front-Panel Inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Indicator Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Drives in the Drive Cage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Hard-Disk Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
System Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Microprocessor Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
System Board Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Expansion Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Expansion-Card Cage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Expansion Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Riser Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
DIMMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Microprocessor/Heat Sink Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Terminator or Add-In Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
vi
Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Add-In Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
System Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Appendix A
System Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
System Setup Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Index
Figures
Figure 1-1.
Figure 1-2.
Figure 1-3.
Figure 1-4.
Figure 1-5.
Figure 1-6.
Figure 1-7.
Figure 1-8.
Figure 1-9.
Figure 1-10.
Figure 1-11.
Figure 4-1.
Figure 4-2.
Figure 4-3.
Figure 4-4.
Figure 4-5.
Figure 4-6.
Figure 4-7.
Figure 4-8.
Figure 4-9.
Figure 4-10.
Figure 4-11.
Figure 4-12.
Figure 4-13.
Figure 4-14.
Figure 4-15.
System Unit Orientation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Front-Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Internal View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Riser-Board Expansion-Card Connectors . . . . . . . . . . . . . . . . 1-5
DC Power Connector P1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
DC Power Connectors P2, P3, P4, P5, and P6. . . . . . . . . . . . . 1-9
DC Power Connectors P7 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
DC Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Power Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
System Board Components . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
System Board Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Floor Stand Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
System-Unit Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Padlock Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Eject, Power, and Reset Button Removal . . . . . . . . . . . . . . . . 4-5
Front-Panel Insert Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Indicator Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Speaker Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Drive Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
3.5-Inch Diskette Drive Removal . . . . . . . . . . . . . . . . . . . . . 4-10
5.25-Inch Drive Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Hard-Disk Drive Bracket Removal . . . . . . . . . . . . . . . . . . . . 4-12
Hard-Disk Drive Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Power Supply Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Microprocessor Fan Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-15
System Board Components . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
vii
Figure 4-16.
Figure 4-17.
Figure 4-18.
Figure 4-19.
Figure 4-20.
Figure 4-21.
Figure 4-22.
Figure 4-23.
Figure 4-24.
Figure 4-25.
Figure 4-26.
Figure A-1.
Expansion-Card Cage Removal . . . . . . . . . . . . . . . . . . . . . . 4-17
Expansion-Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Riser Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
DIMM Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
DIMM Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Microprocessor Securing Clip . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Microprocessor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
Terminator Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Add-In Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
System Battery Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
System Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
System Setup Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Tables
Table 1-1.
Table 1-2.
Table 1-3.
Table 1-4.
Table 1-5.
Table 3-1.
Table 3-2.
Table A-1.
viii
DC Voltage Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Jumper Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Interrupt Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
DREQ Line Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
System Setup Categories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
ix
Read This First
A prerequisite for using this manual to service Dell computer systems is a
basic knowledge of IBM®-compatible PCs and prior training in IBMcompatible PC troubleshooting techniques. In addition to information
provided in this manual and the User’s Guide that came with the system, Dell
provides the Diagnostics and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test the computer
system.
Warnings, Cautions, and Notes
Throughout this manual, there may be blocks of text printed in bold type or in
italic type. These blocks are warnings, cautions, and notes, and they are used as
follows:
WARNING: A WARNING indicates the potential for bodily harm and provides instructions for how to avoid the problem.
CAUTION: A CAUTION indicates either potential damage to hardware or
loss of data and provides instructions for how to avoid the problem.
NOTE: A NOTE provides helpful information about using the computer system.
x
Chapter 1
System Overview
This service manual covers the Dell
® OptiPlex ® GXpro
high-speed, upgradable desktop systems, which use the Intel® Pentium® Pro family of
microprocessors. These Dell systems incorporate the high-performance PCI
local bus as well as the ISA expansion bus. These buses are built into the system
board, which also integrates a 3.3-V Pentium Pro microprocessor and all other
elements of the basic computer system.
The Pentium Pro microprocessor contains a built-in clock multiplier circuit,
which increases the microprocessor’s internal operating frequency to a multiple
of the system clock frequency. The microprocessors for each of these systems
and their operating frequencies are as follows:
• Dell OptiPlex GXpro 180 systems — 180 MHz derived from a system clock
frequency of 60 MHz
• Dell OptiPlex GXpro 200 systems — 200 MHz derived from a system clock
frequency of 66 MHz
Dell OptiPlex GXpro systems contain either an integrated 10-Mbps or
10/100-Mbps 3Com® NIC, both of which are covered in this document.
System Overview
1-1
System Features
In addition to the standard features found in a traditional personal computer, the
Dell OptiPlex GXpro desktop systems include the following new and/or
advanced features:
•
•
•
•
•
•
•
•
Dual-processor capability.
Advanced combination ISA and PCI expansion subsystem.
Plug and Play capability.
Enhanced dual-interface EIDE subsystem.
16-bit integrated audio controller.
PCI video card.
Integrated 10-Mbps or 10/100-Mbps Ethernet NIC.
Integrated Universal Serial Bus (USB) controller with two USB-compliant
connectors (included on systems containing the 10/100-Mbps NIC).
• Desktop chassis.
• Thermal monitoring.
• Main system memory consisting of 16 to 512 MB of high-speed EDO
DIMMs that provide ECC functionality when used with the Intel 82440FX
PCIset.
• SMART support-compliant hard-disk drives and SMART support in the
system BIOS, which warns you at system start-up if a hard-disk drive has
become unreliable.
• Quick tests feature in the diskette-based diagnostics (for more information
about Run Quick Tests, see “Running the Diskette-Based Diagnostics” in
Chapter 2).
All of these features (except the Run Quick Tests feature described in Chapter 2) are briefly described in this chapter. For a complete list of system features,
see “Technical Specifications” found later in this chapter.
When following the text in this manual, assume that the location or direction
relative to the system unit is as shown in Figure 1-1.
1-2
Dell OptiPlex GXpro Systems Service Manual
back of system unit
left side
right side
front of system unit
Figure 1-1. System Unit Orientation
CAUTION: To avoid possible data or file structure corruptions, the
front-panel reset button should be used only when the system cannot be
rebooted by pressing <Ctrl><Alt><Del>. Before you use the reset button
to initiate a hardware reset, close any open application programs and
files if possible.
System Overview
1-3
power button
power indicator
reset button
hard-disk drive access indicator
Figure 1-2. Front-Panel Features
3.5-inch drive
drive cage
diskette/tape drive
interface cable
hard-disk drive
bracket
DC power cable
system board
power supply
expansion-card
cage
AC power
receptacle
voltage
selection switch
parallel port connector
serial port 1 connector
mouse connector
keyboard connector
chassis
serial port 2 connector
USB connector (2)
NIC connector
video connector
microphone jack
speaker-out jack
card-slot openings
line-in jack
Figure 1-3. Internal View
1-4
Dell OptiPlex GXpro Systems Service Manual
Dual-Processor Capability
With the installation of a microprocessor add-in card in the terminator card slot,
the system unit becomes a dual-processing system. The add-in card’s microprocessor must have the same frequency and cache size as the system board’s
microprocessor. In order to take advantage of two processors, dual-processing
systems must have multiprocessing operating systems, such as the Microsoft®
Windows NT ® 3.5x, Windows NT 4.0, and Novell® NetWare® SMP (symmetric
multiprocessing) operating systems. The microprocessor chips on both the system
board and the processor card are replaceable.
Advanced Expansion Subsystem
The computer system offers advanced expansion subsystems that can support a
mixture of traditional ISA expansion cards (called legacy cards), Plug and Play
ISA expansion cards, and PCI expansion cards. The ISA Configuration Utility
(ICU) included with the system provides a means of avoiding resource conflicts
that might arise from such an arrangement.
After all legacy cards have been configured with the ICU, the system automatically assigns any required memory space, IRQ lines, and DMA channels to any
installed Plug and Play ISA expansion cards and PCI expansion cards the next
time the system is rebooted. Chapter 4, “Using the ISA Configuration Utility,”
in the User’s Guide describes the ICU and provides instructions for using it to configure the system.
The five expansion slots include two ISA expansion-card connectors and five
PCI expansion-card connectors. (Two PCI expansion-card connectors and the
two ISA expansion-card connectors share a single expansion slot, resulting in a
total of five expansion slots.) The expansion-card connectors are located on a
riser board (see Figure 1-4).
ISA2
PCI 5
ISA1
JMIDI connector
PCI1
JHDLED connector
Figure 1-4. Riser-Board Expansion-Card Connectors
System Overview
1-5
Hard-Disk Drive Options
The hard-disk drive bracket is located next to the drive bays at the front of the
system unit. The system unit can contain up to two, one-inch-high, hard-disk
drives or one, 1.6-inch-high, half-height and one, one-inch-high, hard-disk
drive.
Enhanced Dual-Interface EIDE Subsystem
The enhanced dual-interface EIDE subsystem supports two EIDE interfaces
(primary and secondary), each of which can support up to two EIDE devices.
The EIDE controller resides on the high-speed PCI local bus.
• The primary EIDE interface (IDE1) provides support for up to two highperformance EIDE devices. The system’s boot drive should be connected to
the primary EIDE interface.
• The secondary EIDE interface (IDE2) also provides support for up to two
high-performance EIDE devices, typically EIDE tape drives or CD-ROM
drives.
NOTE: The externally accessible drive bays at the front of the system unit are
normally used for diskette drives, CD-ROM drives, and/or tape drives. Harddisk drives should be installed in the internal hard-disk drive bracket described
in the previous subsection, “Hard-Disk Drive Options.” For detailed information
about the data storage subsystem, see Chapter 9, “Installing Drives,” in the User’s
Guide.
Audio Controller
The system board has a built-in 16-bit Creative Labs ViBRA 16 audio controller
chip and connectors on the back panel for connecting the system unit to external
audio devices (speakers, microphone). The controller supports all the sound
functions found on the Sound Blaster expansion card from Creative Laboratories, Inc.
Chapter 6, “Using the Integrated Audio Controller,” in the User’s Guide provides instructions for connecting the system to external audio devices and
configuring the integrated audio controller to avoid resource conflicts.
PCI Video Card
The video subsystem consists of a high-speed, high-resolution video adapter card
installed in one of the bottom two PCI expansion-card connectors (PCI1 or PCI2).
Because the video adapter card connects to the PCI local bus rather than to the
ISA-compatible system bus, communication between the video subsystem and
the microprocessor is much faster. The PCI local bus operates at a frequency of
30 or 33 MHz as opposed to the 8-MHz operating frequency of the ISA bus.
NOTE: Some users may use an ISA video adapter card.
1-6
Dell OptiPlex GXpro Systems Service Manual
NIC
GXpro systems contain either an integrated 10-Mbps or 10/100-Mbps 3Com
NIC. GXpro systems containing the 10-Mbps Ethernet NIC have a built-in integrated 3Com 3C915 NIC chip. GXpro systems containing the 10/100-Mbps
Ethernet NIC have a built-in integrated 3Com 3C916 Ethernet NIC chip. The
NIC subsystem connects to the Ethernet network through a single RJ45 connector on the back panel of the computer.
The 10/100-Mbps NIC supports a 10-Mbps direct connection to either a category-3 or a category-5 ethernet cable. When the NIC operates in the
100-Mbps mode, a category-5 ethernet cable must be used.
GXpro systems with the 10/100-Mbps NIC also contain two USB connectors.
Thus, to determine whether a particular system contains the 10/100-Mbps NIC,
look for one of the following indications:
• USB connectors next to the NIC connector on the computer’s back panel
• The message USB Enhanced displayed during the boot routine
• A USB category on page 2 of the System Setup
If any of these indications are present, your system has the 10/100-Mbps NIC.
Chapter 5, “Using the Network Interface Controller,” in the User’s Guide provides instructions for connecting the system to, and configuring it for use on, an
Ethernet network.
USB
USB capability simplifies connection of peripheral devices such as mice, printers, and computer speakers. The USB connectors on your computer’s back
panel provide a single connection point for multiple USB-compliant devices.
USB-compliant devices can also be connected and disconnected while the system is running.
NOTE: USB capability is available only on systems with the 10/100-Mbps NIC.
Desktop Chassis
The system unit can be set horizontally or vertically, when used with the floor
stand provided with the system. The floor stand attaches to the left side of the
system.
Thermal Monitoring
The primary and, if installed, secondary microprocessors have a thermal sensor
that monitors the processor’s temperature. If the critical threshold is exceeded, a
system alarm triggers a system management interrupt (SMI), which alerts the
BIOS. The power indicator flashes, and a message appears on the monitor to
alert the user that the system will shut down in an orderly manner, preventing
the loss of data.
System Overview
1-7
SMART Support
The system has SMART-compliant hard-disk drives and SMART support in the
system BIOS, which warns you at system start-up if a hard-disk drive has
become unreliable.
System Unit
The following subsections provide service-related information about the system
unit.
System Power Supply
The 230-W system power supply can operate from an AC power source of
115 VAC at 60 Hz or 230 VAC at 50 Hz. The system power supply provides the
DC operating voltages and currents listed in Table 1-1.
NOTE: The power supply produces DC voltages only under its loaded condition. Therefore, when you measure these voltages, the DC power connectors
must be connected to their corresponding power input connectors on the system
board or drives.
.
Table 1-1. DC Voltage Ranges
Voltage
Range
Maximum Output
Current 1
+3.3 VDC
+3.15 to +3.45 VDC
14.0 A
+5 VDC
+4.75 to +5.25 VDC
29.0 A
+12 VDC
+11.40 to +12.60 VDC
6.0 A
–12 VDC
–10.80 to –13.20 VDC
0.3 A
–5 VDC
–4.50 to –5.50 VDC
0.3 A
+5 VFP 2
+4.75 to +5.25 VDC
10 mA
1
Maximum continuous DC output power shall not exceed 230 W. Maximum combined
load on +5 VDC and +3.3 VDC shall not exceed 170 W.
2
VFP (volts flea power) — sometimes called “standby power.”
.
Pin Assignments for the DC Power Connectors
The power-supply output voltages can be measured at the back (wire side) of
the connectors without disconnecting them. The following illustrations show
the wire side of the connectors.
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Dell OptiPlex GXpro Systems Service Manual
–5 VDC (white)
+5 VDC (red)
common (black)
+5 VDC (red)
common (black)
+5 VDC (red)
TFSC 2 (brown)
common (black)
PSON# 1 (gray)
+5 VDC (red)
11 12 13 14 15 16 17
18 19 20
1
8
P1
2
3
4
5
6
7
9
10
+5 VDC (red)
common (black)
common (black)
common (black)
+5 VDC (red)
–12 VDC (blue)
+12 VDC (yellow)
common (black)
+5 VFP (purple)
PWRGOOD 3 (orange)
1
Pin 11 — PSON# should measure between +4 and +5 VDC except when the power button
on the front panel is pressed, taking PSON# to its active-low state.
2
Pin 19 — Thermal fan-speed control (TFSC) is a power-supply input signal used to control
power-supply fan speed in special applications.
3
Pin 5 — PWRGOOD should measure between +4 and +5 VDC when the power supply is on
and operating to indicate that all power-supply output voltages are within ranges specified
in Table 1-1.
Figure 1-5. DC Power Connector P1
P2, P3,
P5, P6
1
2
3
4
P4
1
2
3
4
+12 VDC (yellow)
+5 VDC (red)
common (black)
common (black)
common (black)
common (black)
+5 VDC (red)
+12 VDC (yellow)
Figure 1-6. DC Power Connectors P2, P3, P4, P5, and P6
System Overview
1-9
P7
1
2
3
4
5
6
+3.3 VDC (blue/white)
+3.3 VDC (blue/white)
+3.3 VDC (blue/white)
common (black)
common (black)
common (black)
Figure 1-7. DC Power Connector P7
DC Power Distribution
Figures 1-8 and 1-9 provide the following information about DC power
distribution:
• Power-supply connector identification
• Power cable connections for diskette, tape, CD-ROM, and hard-disk drives
• Power distribution to sockets and connectors on the system board
P1
P4
P6
P7
P5
P3
P2
Figure 1-8. DC Power Cables
1-10
Dell OptiPlex GXpro Systems Service Manual
system board
keyboard
controller
+3 VDC
riser board
battery
power
management
logic
P1
PWRGOOD
system
power supply
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
RTC/
NVRAM
+5 VDC
+12 VDC
–12 VDC
POWER1
RISER
PSON#
+5 VFP
+5 VDC
–5 VDC
+12 VDC
–12 VDC
+5 VDC
–5 VDC
+12 VDC
–12 VDC
+5 VDC
–5 VDC
+12 VDC
–12 VDC
PCI1
through
PCI5
ISA1,
ISA2
P7
+3.3 VDC
POWER2
optional
drive
optional
drive
P2
DIMM_A
P3
FUSE
3.5-inch
diskette drive
FAN
+5 VFP
+5 VDC
PANEL
+5 VDC
USB
DIMM_B
FUSE
P4
internal
hard-disk drive
main memory
sockets
+12 VDC
DIMM_C
DIMM_D
P5
MICROPROCESSOR
+5 VDC
+5 VDC
KYBD
MOUSE
processor
core regulator
+2.1–3.5 VDC
+3.3 VDC
P6
internal
hard-disk drive
2ND_CPU
+2.1–3.5 VDC
+3.3 VDC
Figure 1-9. Power Distribution
System Overview
1-11
System Board Layout
The subsections that follow provide service-related information about the system board components.
microphone jack (NIC-IN)
speaker-out jack
(SPKR-OUT)
NIC
connector
(ENET)
USB
connector
(USB)
serial port 2
connector
(SERIAL2)
keyboard/mouse
connectors
(stacked)
(KYBD/MOUSE)
serial port 1/parallel
port connectors (stacked)
(PARALLEL/SERIAL)
line-in jack (LINE-IN)
microprocessor fan
connector (FAN)
battery socket
(BATTERY)
riser board power
connector (RSR PWR1)
DIMM sockets (4)
main power input
connector (POWER1)
microprocessor socket
(MICROPROCESSOR)
riser board
connector (RISER)
3.3-V power
input connectors
(POWER2)
riser board power
connector
(RSR PWR2)
CD-ROM
connector (CD_IN)
secondary microprocessor
card (or terminator
card) connector (2ND_CPU)
diskette/tape drive interface
connector (DSKT)
front of system unit
primary EIDE
interface connector (IDE1)
jumpers
control panel
connector (PANEL)
secondary EIDE interface
connector (IDE2)
Figure 1-10. System Board Components
Video Memory
See the documentation from the video card manufacturer that came with your
system for information on removing and replacing video-memory upgrade
chips.
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Dell OptiPlex GXpro Systems Service Manual
Main Memory
The four DIMM sockets on the system board can accommodate combinations
of 16-, 32-, 64-, and 128-MB DIMMs up to a total memory capacity of 512 MB.
The system is shipped with high-speed (60-ns) EDO DIMMs that provide ECC
functionality when used with the Intel 82440FX PCIset. EDO parity mode
DIMMs can be mixed, as follows:
• Any socket can be populated or not. There is no requirement that one socket
be filled before the other, and empty sockets can be left between installed
DIMMs. Dell recommends populating the sockets in order from A to D.
• Each DIMM socket does not have to contain DIMMs of the same size or
speed. DIMMs may be installed in any order.
See “DIMMs” in Chapter 4 for information on removing and replacing DIMMs.
System Board Jumpers
jumpered
unjumpered
Figure 1-11. System Board Jumpers
System Overview
1-13
Table 1-2. Jumper Descriptions
Default
Setting
Jumper
Description
PSWD
Password enable/disable.
Jumper installed, activates
password feature.
Installed (password feature
enabled)
BIOS
Used for internal Dell
debug tool.
Not installed (reserved, do not
change)
RSRVD4
RSRVD3
RSRVD2
RSRVD1
Reserved.
Not installed (reserved, do not
change)
200MHZ
Microprocessor speed.
Installed if the microprocessor’s internal speed is
200 MHz, or else not
installed
180MHZ
Microprocessor speed.
Installed if the microprocessor’s internal speed is
180 MHz, or else not
installed
Interrupt Assignments
Table 1-3. Interrupt Assignments
1-14
IRQ Line
Used By/Available
IRQ0
Generated by system timer.
IRQ1
Generated by keyboard controller to indicate that keyboard’s output buffer is full.
IRQ2
Generated internally by interrupt controller to enable IRQ8
through IRQ15.
IRQ3
and
IRQ4
Generated by super I/O controller to indicate that device connected to corresponding serial port requires service (IRQ3 for
COM2 or COM4; IRQ4 for COM1 or COM3).
IRQ5
Available for use by expansion card unless this IRQ line is used
by secondary parallel port.
IRQ6
Generated by super I/O controller to indicate that diskette or tape
drive requires service.
IRQ7
Generated by super I/O controller to indicate that device connected to parallel port requires service.
Dell OptiPlex GXpro Systems Service Manual
Table 1-3. Interrupt Assignments (continued)
IRQ Line
Used By/Available
IRQ8
Generated by keyboard controller for each tick of RTC.
IRQ9
Available for use by expansion card.
IRQ10
Available for use by expansion card.
IRQ11
Available for use by expansion card.
IRQ12
Generated by keyboard controller to indicate that mouse’s output
buffer is full.
IRQ13
Generated by math coprocessor to indicate coprocessor error.
IRQ14
Generated by device connected to primary EIDE port to indicate
that device requires service. If no EIDE devices are installed, this
line is available for other use.
IRQ15
Generated by device connected to secondary EIDE port to indicate that device requires service. If no device is connected to
secondary EIDE port, IRQ15 is available for use by expansion
card.
DMA Channel Assignments
Table 1-4. DREQ Line Assignments
DREQ Line
Used By/Available
DREQ0
Available
DREQ1
Available
DREQ2
Generated by super I/O controller to initiate DMA cycle for
attached diskette drive
DREQ3
Available
DREQ4
Generated by bus controller chip to activate second DMA controller
DREQ5
Available (default) DMA on-board sound controller
DREQ6
Available
DREQ7
Available
System Overview
1-15
Technical Specifications
Table 1-5. Technical Specifications
Microprocessor
Microprocessor type . . . . . . . . Intel Pentium Pro microprocessor
Microprocessor speed. . . . . . . 200 or 180 MHz
First-level cache . . . . . . . . . . . 16 KB
Second-level cache . . . . . . . . . 256 KB for 180 or 200 MHz; 512 KB for
200 MHz
Math coprocessor . . . . . . . . . . internal to the microprocessor
System Information
System chip set. . . . . . . . . . . . Intel Natoma 82440FX set
Data bus width . . . . . . . . . . . . 64 bits
Address bus width . . . . . . . . . 32 bits
Flash EPROM. . . . . . . . . . . . . 2 Mbits
Expansion Bus
Bus types . . . . . . . . . . . . . . . . PCI and ISA
Bus speed . . . . . . . . . . . . . . . . PCI: 30 MHz (180/60 processor); 33 MHz
(200/66 processor)
ISA: 7.5 MHz (180/60 processor); 8.25 MHz
(200/66 processor)
PCI expansion-card
connectors. . . . . . . . . . . . . . . . five (two PCI connectors share card-slot openings with the two ISA connectors)
ISA expansion-card
connectors. . . . . . . . . . . . . . . . two (both ISA connectors share card-slot
openings with two of the PCI connectors)
ISA expansion-card
connector size . . . . . . . . . . . . . 98 pins
ISA expansion-card connector
data width (maximum) . . . . . . 16 bits
PCI expansion-card
connector size . . . . . . . . . . . . . 120 pins
PCI expansion-card connector
data width (maximum) . . . . . . 32 bits
1-16
Dell OptiPlex GXpro Systems Service Manual
Table 1-5. Technical Specifications (continued)
System Clocks
System clock . . . . . . . . . . . . . . 60 or 66 MHz (matches external processor
speed)
Diskette/communications
ports . . . . . . . . . . . . . . . . . . . . 24 MHz from the system clock
Memory
Architecture . . . . . . . . . . . . . . 64-bit, noninterleaved
DIMM sockets . . . . . . . . . . . . four
DIMM capacities . . . . . . . . . . 16, 32, 64, and 128 MB, EDO ECC mode
Standard RAM . . . . . . . . . . . . 16 MB
Maximum RAM . . . . . . . . . . . 512 MB
BIOS address . . . . . . . . . . . . . F000:0000h–F0000:FFFFh
Drives
Externally accessible bays . . . one 3.5-inch bay, dedicated to a 3.5-inch diskette drive; two 5.25-inch bays for half-height
diskette drives, tape drives, or CD-ROM
drives
Internally accessible bays . . . . two hard-disk drive bays; one 1.6-inch-high
and one 1-inch-high EIDE or SCSI hard-disk
drive
Ports
Externally accessible:
Serial (DTE) . . . . . . . . . . . two 9-pin connectors; 16550-compatible
Parallel . . . . . . . . . . . . . . . one 25-hole connector (bidirectional)
Video . . . . . . . . . . . . . . . . . one 15-hole connector (on add-in video card)
PS/2-style keyboard . . . . . 6-pin mini-DIN
PS/2-compatible
mouse . . . . . . . . . . . . . . . . 6-pin mini-DIN
NIC . . . . . . . . . . . . . . . . . . RJ45 connector
USB. . . . . . . . . . . . . . . . .
two USB-compliant connectors
Audio line in . . . . . . . . . . . miniature audio jack
Audio speaker out . . . . . . . miniature audio jack
Audio mike in . . . . . . . . . . miniature audio jack
System Overview
1-17
Table 1-5. Technical Specifications (continued)
Ports (continued)
Internally accessible:
EIDE hard-disk drive . . . . two 40-pin connectors on PCI local bus
Diskette drive . . . . . . . . . . 34-pin connector
Video
Video type. . . . . . . . . . . . . . . . PCI video card (see manufacturer’s specifications)
Key Combinations
<Ctrl><Alt><Del> . . . . . . . . . . . . restarts (reboots) the system
<Ctrl><Alt><Enter>. . . . . . . . . . . starts System Setup program (during POST
only)
<Ctrl><Alt><\> . . . . . . . . . . . toggles microprocessor speeds on 101-key
keyboard (in MS-DOS® real mode only)
<Ctrl><Alt><#> . . . . . . . . . . . toggles microprocessor speeds on 102-key
keyboard
Controls and Indicators
Reset control. . . . . . . . . . . . . . push button
Power control . . . . . . . . . . . . . push button
Power indicator. . . . . . . . . . . . green LED
Hard-disk drive access
indicator . . . . . . . . . . . . . . . . . green LED
Link integrity indicator
(on NIC connector). . . . . . . . . green LED
Activity indicator
(on NIC connector). . . . . . . . . yellow LED
Power
DC power supply:
Wattage . . . . . . . . . . . . . . . 230 W
Heat dissipation . . . . . . . . 600 BTUs (nominal)
Voltage . . . . . . . . . . . . . . . 90 to 135 V at 60 Hz;
180 to 265 V at 50 Hz
Backup battery . . . . . . . . . . . . 3-V CR2032 coin cell
1-18
Dell OptiPlex GXpro Systems Service Manual
Table 1-5. Technical Specifications (continued)
Physical
Height . . . . . . . . . . . . . . . . . . . 16.5 cm (6.5 inches)
Width. . . . . . . . . . . . . . . . . . . . 41.9 cm (16.5 inches)
Depth. . . . . . . . . . . . . . . . . . . . 44.5 cm (17.5 inches)
Environmental
Weight . . . . . . . . . . . . . . . . . . 12.7 kg (28 lb) or more, depending on options
installed
Temperature:
Operating . . . . . . . . . . . . . 10° to 35°C (50° to 95°F)
Storage . . . . . . . . . . . . . . . –40° to 65°C (–40° to 149°F)
Relative humidity . . . . . . . 8% to 80% (noncondensing)
Maximum vibration:
Operating . . . . . . . . . . . . . 0.25 G at 3 to 200 Hz for 30 min
Storage . . . . . . . . . . . . . . . 0.5 G at 3 to 200 Hz for 30 min
Maximum shock:
Operating . . . . . . . . . . . . . half-sine wave form: 50 G for 2 ms
Storage . . . . . . . . . . . . . . . half-sine wave form: 110 G for 2 ms;
square wave form: 27 g for 15 ms
Altitude:
Operating . . . . . . . . . . . . . –16 to 3048 m (–50 to 10,000 ft)
Storage . . . . . . . . . . . . . . . –16 to 10,600 m (–50 to 35,000 ft)
z
System Overview
1-19
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Dell OptiPlex GXpro Systems Service Manual
Chapter 2
Basic Troubleshooting
T
his chapter describes basic troubleshooting procedures that can help you
diagnose a computer system problem. These procedures can often reveal the
source of a problem or indicate the correct starting point for troubleshooting the
system. A brief explanation of how to load and start the diskette-based diagnostics is located at the end of the chapter. Dell recommends that you perform the
following procedures in the order they are presented in this manual.
Initial User Contact
When you first contact a user who has a problem, ask the user to describe the
problem and the conditions under which it occurs. A verbal description can
often indicate the cause of a problem or indicate the appropriate troubleshooting
procedure to use. After the user describes the problem, follow these steps:
1. Ask the user to back up any data on the hard-disk drive if the system’s
condition permits.
Appendix D, “Maintaining the System,” in the User’s Guide provides information about backing up data.
2. Ask the user to try to duplicate the problem by repeating the operations
he or she was performing at the time the problem occurred.
Can the user duplicate the problem?
Yes. Proceed to step 3.
No. Proceed to the next section, “External Visual Inspection.”
3. Observe the user to determine if he or she is making an error, such as
typing an incorrect key combination or entering a command
incorrectly.
Is the problem a result of user error?
Yes. Instruct the user in the proper procedure, or direct him or her to the
appropriate user documentation for the correct procedure.
No. Proceed to the next section, “External Visual Inspection.”
Basic Troubleshooting
2-1
External Visual Inspection
The external visual inspection consists of a quick inspection of the exterior of
the system unit, the monitor, the keyboard, any peripherals, and cables. While
performing the visual inspection, make any necessary corrections. To perform
the external visual inspection, follow these steps:
1. Turn off the system unit, the monitor, and all peripherals.
2. Verify that all power cables are properly connected to the system unit,
the monitor and peripherals, and their power sources.
3. Verify that the keyboard and mouse interface cables are firmly
attached to the proper connectors on the back of the system unit.
For a PS/2-compatible mouse, the keyboard and mouse interface cable connectors are identical except for their labels. If needed, see “System
Features” in Chapter 1.
For a serial mouse, the mouse interface cable must be firmly attached to one
of the serial port connectors, and its captive screws must be secure enough
to ensure a firm connection.
4. Verify that any devices connected to the serial ports, parallel port, and
USB are properly attached.
Each of the serial, parallel, and USB interface cables must be firmly
attached to an appropriate connector on the back of the system unit as well
as to the interface connector on the device. The captive screws that secure
these connectors at each end of the interface cable must be secure enough to
ensure a firm connection.
5. Verify that the video interface cable is firmly attached to the connector
on the video expansion card and to the connector on the back of the
monitor.
For proper connection of the video monitor, see the documentation for the
monitor.
6. Inspect all external monitor controls for any obvious damage or
improper settings.
For proper settings of the video monitor controls, see the documentation for
the monitor.
7. Inspect the keyboard to ensure that no keys are sticking.
If one or more keys are sticking, it may be necessary to replace the
keyboard.
2-2
Dell OptiPlex GXpro Systems Service Manual
8. Inspect the exterior of the system unit, including all controls and indicators, and all user-accessible data storage devices for any signs of
physical damage.
Does the inspection reveal any problems?
Yes. Proceed to the appropriate procedure in Chapter 4, “Removing and
Replacing Parts.”
No. Proceed to the next section, “Observing the Boot Routine.”
Observing the Boot Routine
After you have performed an external visual inspection as described in the previous section, you should boot the system and, while the boot routine is
running, observe the system for any indications of problems.
NOTE: Most of the steps in this procedure require observation of system functions and indications, some of which can occur simultaneously. It may be
necessary to reboot the system several times in order to complete all of these
steps.
To observe problem indications during the boot routine, follow these steps:
1. Insert the diagnostics diskette into drive A. Turn on all peripherals and
the system unit. If the system unit is already on, press the reset button
or <Ctrl><Alt><Del> to reboot the system.
2. Check the power supply fan.
Does the fan run normally?
Yes. Proceed to step 3.
No. Troubleshoot the system power supply.
3. Watch the Num Lock, Caps Lock, and Scroll Lock indicators on the
upper-right corner of the keyboard. After all three indicators flash
momentarily, the Num Lock indicator should light up and remain on.
Do these indicators flash on and off within approximately ten seconds after
the boot routine starts?
Yes. Proceed to step 4.
No. Troubleshoot the system power supply. If the troubleshooting procedure indicates that the system power supply is operational, troubleshoot
the memory.
4. During the boot routine, observe the system unit for any of the
following:
• Diskette-drive and hard-disk drive access indicators: These indicators
light up in response to data being transferred to or from the drives. If
either of these indicators fails to light up during the boot routine, troubleshoot the diskette drive or hard-disk drive subsystem, as appropriate.
Basic Troubleshooting
2-3
• System error messages: These messages can indicate problems or provide status information. If a system error message is displayed, see
Table 3-2.
• Beep codes: A beep code is a series of beeps that indicates an error condition. If the system emits a beep code, see Table 3-1.
NOTE: The system beeps once during the boot routine. This single beep is
normal and is not a beep code.
5. Observe the monitor screen for the Diagnostics Menu.
Does the Diagnostics Menu appear?
Yes. See “Running the Diskette-Based Diagnostics” found later in this
chapter.
No. Proceed to step 6.
6. Insert another copy of the diagnostics diskette into the diskette drive,
and reboot the system.
Does the Diagnostics Menu appear?
Yes. See “Running the Diskette-Based Diagnostics” found later in this
chapter.
No. Proceed to the next section, “Internal Visual Inspection.”
Internal Visual Inspection
CAUTION: Before you proceed with the internal visual inspection
described in this section, ensure that the user has saved all open files and
exited all open application programs if possible.
A simple visual inspection of a system unit’s interior hardware can often lead to
the source of a problem, such as a loose expansion card, cable connector, or
mounting screw. When you perform the visual inspection, refer to “System
Features” in Chapter 1 to locate components in the inspection procedure.
To perform the internal visual inspection, follow these steps:
1. Turn off the system, including any attached peripherals, and disconnect
all the AC power cables from their power sources.
2. Remove the system unit cover.
3. Verify that all chips, DIMMs, and expansion cards, are fully seated in
their sockets or connectors.
WARNING: The microprocessor can get extremely hot. Be sure the
chip has had sufficient time to cool before you touch it.
To ensure that the chips are fully seated in their sockets, press firmly on the
top of each chip.
2-4
Dell OptiPlex GXpro Systems Service Manual
To reseat the microprocessor, remove it from its socket and reinstall it as
described in “Microprocessor/Heat Sink Assembly” in Chapter 4.
To reseat a DIMM, remove it from its socket and reinstall it as described in
“DIMMs” in Chapter 4.
If you need to reseat an expansion card, use a 1/4-inch nut driver to remove
the screw that secures the card-mounting bracket. Grasp the card by its top
corners, and carefully pull it out of its connector. Reinsert the card in its
connector, and carefully push it in until it is fully seated. Then reinstall the
card-mounting bracket’s retaining screw.
4. Verify that all jumpers are set correctly.
For information about these jumpers, see “System Board Jumpers” in Chapter 1.
5. Check all cable connectors inside the system unit to verify that they are
firmly attached to their appropriate connectors.
6. Reinstall the system unit cover.
7. Reconnect the system unit and any attached peripherals to their power
sources, and turn them on.
Does the problem appear to be resolved?
Yes. No further steps are necessary. Terminate the procedure.
No. Proceed to “Eliminating Resource Conflicts,” “Running the DisketteBased Diagnostics,” and to “Getting Help” found later in this chapter.
Eliminating Resource Conflicts
Devices within the system unit may require dedicated memory spaces, interrupt
levels, or DMA channels, all of which must be allocated during installation of
the devices. Because a device may be installed at a different time, it is possible
that the same resource is assigned to two or more devices.
Resource conflicts can result in disorderly or erratic system operation or failure
of the system to operate at all. If you suspect that resource conflicts might exist,
check the system and reassign the resources as necessary.
Running the Diskette-Based Diagnostics
The diskette-based diagnostics (included with the system) contains tests that aid
in troubleshooting all major components of the computer system.
CAUTION: To prevent damage to the original diagnostics diskette,
always use a backup copy of the diagnostics diskette when servicing a
user’s system. Dell recommends that users make several copies of this
diskette to ensure that one is always available.
Basic Troubleshooting
2-5
To start the diagnostics, turn off the system unit, insert a diagnostics diskette
into drive A, and then turn on the system unit.
Starting the diagnostics causes the Dell logo screen to appear on the monitor
screen, followed by a message indicating that the diagnostics is loading. Before
the diagnostics loads, a program tests the portion of main memory (RAM)
required for loading the diagnostics. If a RAM error is detected, a message
appears on the screen telling you which DIMM has failed.
If no errors are found in RAM, the diagnostics loads and the Diagnostics Menu
appears. This menu lets you choose the following options or exit to the
MS-DOS prompt:
• Run Quick Tests — Runs selected tests from all test groups to quickly
locate a failure or to indicate where further testing is needed to isolate a
failure
• Run All Tests — Runs all tests for a thorough test of the system
• Run Specific Tests — Tests a particular area or subsystem
Getting Help
If none of the troubleshooting procedures in this chapter or the tests in the diskette-based diagnostics reveals the source of the problem or leads to the proper
troubleshooting steps for determining the source of the problem, call Dell for
technical assistance. For instructions, see the chapter titled “Getting Help” in
the Diagnostics and Troubleshooting Guide.
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Dell OptiPlex GXpro Systems Service Manual
Chapter 3
Beep Codes and Error Messages
T
his chapter describes beep codes and system error messages that can occur
during system start-up or, in the case of some failures, during normal system
operation. The tables in this chapter list faults that can cause a beep code or system error message to occur and the probable causes of the fault in each case.
If a faulty system does not emit beep codes or display system error messages to
indicate a failure, you should use the diskette-based diagnostics to run the
appropriate tests to help isolate the source of the problem. See “Running the
Diskette-Based Diagnostics” in Chapter 2.
POST Beep Codes
If the monitor cannot display error messages during the POST, the system may
emit a series of beeps that identifies the problem or that can help you identify a
faulty component or assembly. Table 3-1 lists the beep codes that may be generated during the POST. Most beep codes indicate a fatal error that prevents the
system from completing the boot routine until the indicated condition is
corrected.
When the system emits a beep code, record the code and then find it in
Table 3-1. If the table does not lead to the source of the problem, run the appropriate tests in the diskette-based diagnostics to assist in troubleshooting the
problem.
Table 3-1. POST Beep Codes
Beep Code
Error
Probable Causes
1-3
Monitor not detected
Disconnected or faulty monitor
1-1-3
NVRAM write/read failure
Defective system board
1-1-4
BIOS checksum failure
Faulty BIOS or defective system board
1-2-1
Programmable interval-timer
failure
Defective system board
1-2-2
DMA initialization failure
1-2-3
DMA page register write/
read failure
Beep Codes and Error Messages
3-1
Table 3-1. POST Beep Codes (continued)
3-2
Beep Code
Error
Probable Causes
1-3-1
Main-memory refresh verification failure
Faulty or improperly seated
DIMMs or defective system
board
1-3-3
Chip or data line failure in the
first 64 KB of main memory
Faulty or improperly seated
DIMMs
1-3-4
Odd/even logic failure in the
first 64 KB of main memory
1-4-1
Address line failure in the
first 64 KB of main memory
1-4-2
Parity failure in the first
64 KB of main memory
2-1-1
through
2-4-4
Bit failure in the first 64 KB
of main memory
3-1-1
Slave DMA-register failure
3-1-2
Master DMA-register failure
3-1-3
Master interrupt-mask register failure
3-1-4
Slave interrupt-mask register
failure
3-2-4
Keyboard-controller test failure
Faulty keyboard controller
(defective system board)
3-3-4
Screen initialization failure
3-4-1
Screen-retrace test failure
Faulty video subsystem
(defective video expansion
card)
3-4-2
Search for video ROM failure
4-2-1
No timer tick
4-2-2
Shutdown failure
4-2-3
Gate A20 failure
4-2-4
Unexpected interrupt in protected mode
4-3-1
Memory failure above
address 0FFFFh
Dell OptiPlex GXpro Systems Service Manual
Defective system board
Defective system board
Faulty or improperly seated
DIMMs
Table 3-1. POST Beep Codes (continued)
Beep Code
Error
Probable Causes
4-3-3
Timer-chip counter 2 failure
Defective system board
4-3-4
Time-of-day clock stopped
Bad battery or defective system board
4-4-1
Serial/parallel port test failure
Faulty I/O chip (defective system board)
System Error Messages
Table 3-2 lists (in alphabetical order) system error messages that can appear on
the monitor screen. These messages can help you find the source of a problem.
Some of these error messages indicate fatal errors. When a fatal error occurs,
the system usually cannot be rebooted until an appropriate hardware change has
been made. The following messages indicate a fatal error:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Bad error-correction code (ECC) on disk read
Controller has failed
Data error
Gate A20 failure
Hard disk controller failure
Hard disk drive read failure
Hard disk failure
Incompatible Processor: CPU0 is B0 step or below
Incompatible Processor: CPU1 is B0 step or below
Incompatible Processors: Cache sizes different
Keyboard clock line failure
Keyboard controller failure
Keyboard data line failure
Keyboard stuck key failure
No timer tick interrupt
Shutdown failure
Terminator/processor card not installed! System
HALTED!
• Timer chip counter 2 failed
• Unexpected interrupt in protected mode
Beep Codes and Error Messages
3-3
Table 3-2. System Error Messages
Message
Definition
Probable Causes
Address mark
not found
BIOS found faulty disk
sector or could not find
particular disk sector.
Attachment
failed to
respond
Diskette drive or harddisk drive controller
cannot send data to
associated drive.
Faulty diskette/tape drive
subsystem or hard-disk
drive subsystem (defective system board). Faulty
interface cable or connector.
Bad command
or file name
Command entered does
not exist or is not in
pathname specified.
Bad command.
Bad errorcorrection
code(ECC) on
disk read
Diskette drive or harddisk drive controller
detected uncorrectable
read error.
Faulty diskette/tape drive
subsystem or hard-disk
drive subsystem (defective system board).
Controller
has failed
Hard-disk drive or
associated controller
defective.
Data error
System received unrecoverable data-read
error from diskette or
hard-disk drive.
Faulty diskette, diskette
drive, or hard-disk drive.
Decreasing
available memory
Read/write failure
during POST prevents
system from using
available memory.
One or more DIMMs
faulty or improperly
seated.
Diskette
drive 0 seek
failure
Diskette/tape drive controller could not locate
specific sector or track.
Faulty or improperly
inserted diskette,
incorrect settings in System Setup program,
loose diskette/tape drive
interface cable, or loose
power cable.
Failure occurred while
system attempted to
read diskette.
Faulty diskette, faulty or
improperly connected
diskette/tape drive interface cable, or loose power
cable.
Diskette
drive 1 seek
failure
Diskette read
failure
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Dell OptiPlex GXpro Systems Service Manual
Table 3-2. System Error Messages (continued)
Message
Definition
Probable Causes
Diskette subsystem reset
failed
System could not successfully issue reset
command to diskette
controller.
Faulty diskette/tape drive
controller (defective system board).
Diskette
write protected
Diskette write-protect
feature activated.
Diskette write-protected.
Drive not
ready
Diskette missing from
or improperly inserted
in diskette drive.
Missing, defective, unformatted, or improperly
inserted diskette.
Gate A20 failure
Gate A20 of the
keyboard controller
malfunctioned.
Faulty keyboard controller (defective system
board).
General failure
Operating system cannot execute command.
Operating system corrupted or not installed
properly.
Hard disk
controller
failure
Hard-disk drive failed to
initialize.
Incorrect configuration
settings in System Setup
program, improperly connected hard-disk drive
cable, faulty hard-disk
controller subsystem
(defective system board),
or loose power cable.
Unsupported version of
microprocessor installed
on system board.
Unsupported microprocessor installed.
In a dual-processor
system both microprocessors do not have
the same level-2 cache.
Microprocessors do not
have the same level-2
cache.
Hard disk
drive read
failure
Hard disk
failure
Incompatible
Processor:
CPU0 is B0
step or below
Incompatible
Processor:
CPU1 is B0
step or below
Incompatible
Processors:
Cache sizes
different
Beep Codes and Error Messages
3-5
Table 3-2. System Error Messages (continued)
Message
Definition
Probable Causes
Invalid configuration
information please run
SETUP program
System Setup program
contains incorrect
system configuration
settings.
Incorrect configuration
settings in System Setup
program or faulty battery.
Keyboard
clock line
failure
System cannot communicate with keyboard.
Keyboard cable connector loose or improperly
connected, defective
keyboard, or defective
keyboard/mouse controller (defective system
board).
Keyboard/mouse controller failed.
Defective keyboard/
mouse controller (defective system board).
Keyboard failure
Keyboard data
line failure
Keyboard
stuck key
failure
Keyboard controller
failure
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Dell OptiPlex GXpro Systems Service Manual
Table 3-2. System Error Messages (continued)
Message
Definition
Probable Causes
Memory
address line
failure at
address, read
value expecting value
During memory test,
value read at address
was incorrect.
Faulty or improperly
seated DIMMs or defective system board.
Memory allocation error
Software in use conflicts with operating
system, application program, or utility.
Faulty application program or utility.
Memory tests
terminated by
keystroke
Memory test did not
complete.
POST memory test terminated by pressing
<Spacebar>.
"Network card
is not
present in
the system"
System does not detect
NIC.
Incorrect NIC drivers
installed.
Memory data
line failure
at address,
read value
expecting value
Memory double
word logic
failure at
address, read
value expecting value
Memory odd/
even logic
failure at
address, read
value expecting value
Memory write/
read failure
at address,
read value
expecting value
Beep Codes and Error Messages
3-7
Table 3-2. System Error Messages (continued)
3-8
Message
Definition
Probable Causes
No boot
device available
System does not recognize diskette drive or
hard-disk drive from
which it is trying to
boot.
Faulty diskette, diskette/
tape drive subsystem,
hard-disk drive, hard-disk
drive subsystem, or no
boot disk in drive A.
No boot sector on
hard-disk
drive
Configuration settings
in System Setup program incorrect, or
operating system corrupted.
Incorrect configuration
settings in System Setup
program, or no operating
system on hard-disk
drive.
No timer tick
interrupt
Timer on system board
malfunctioning.
Defective system board.
Non-system
disk or disk
error
Diskette in drive A or
hard-disk drive does
not have bootable operating system installed
on it.
Faulty diskette, diskette/
tape drive subsystem, or
hard-disk drive subsystem.
Not a boot
diskette
No operating system on
diskette.
No operating system on
diskette.
Plug and Play
Configuration
Error
System encountered
problem in trying to
configure one or more
expansion cards.
System resource conflict.
Read fault
MS-DOS cannot read
from diskette or harddisk drive.
Faulty diskette, diskette/
tape drive subsystem, or
hard-disk drive subsystem (defective system
board).
Requested sector not found
System could not find
particular sector on
disk, or requested sector defective.
Reset failed
Disk reset operation
failed.
Dell OptiPlex GXpro Systems Service Manual
Improperly connected
diskette/tape drive, harddisk drive interface
cable, or power cable.
Table 3-2. System Error Messages (continued)
Message
Definition
Probable Causes
Sector not
found
MS-DOS unable to
locate sector on diskette
or hard-disk drive.
Defective sectors on diskette or hard-disk drive.
Seek error
MS-DOS unable to
locate specific track on
diskette or hard-disk
drive.
Defective diskette or
hard-disk drive.
Seek operation failed
System could not find
particular address mark
on disk.
Faulty diskette or harddisk drive.
Shutdown failure
System board chip
faulty.
Defective system board.
Terminator/
processor
card not
installed!
System HALTED!
System does not have
terminator or add-in
card.
Terminator or add-in
card improperly
installed, or no card
installed.
Time-of-day
clock stopped
Backup battery low.
Defective battery or
faulty chip (defective system board).
Time-of-day
not set
Time or Date settings in
System Setup program
incorrect, or backup battery bad.
Incorrect Time or Date
settings, or defective
backup battery.
Timer chip
counter 2
failed
Timer circuit on system
board malfunctioning.
Defective system board.
Unexpected
interrupt in
protected mode
Keyboard/mouse controller malfunctioning,
or one or more DIMMs
improperly seated.
Improperly seated
DIMMs or faulty keyboard/mouse controller
chip (defective system
board).
WarningThermal
probes failed
At system start-up,
BIOS detected that one
or both thermal probes
are nonoperational.
Defective system board.
Beep Codes and Error Messages
3-9
Table 3-2. System Error Messages (continued)
Message
Definition
Probable Causes
WarningTemperature
is too high
At system start-up,
BIOS detected that
one or both microprocessors have
overheated.
One or both microprocessors are too hot.
Write fault
MS-DOS cannot write
to diskette or hard-disk
drive.
Faulty diskette or harddisk drive.
Write fault
on selected
drive
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Dell OptiPlex GXpro Systems Service Manual
Chapter 4
Removing and Replacing Parts
T
his chapter provides procedures for removing the components, assemblies,
and subassemblies in the system unit. Unless otherwise noted, each procedure
assumes the following:
• You have performed the steps in “Precautionary Measures” found later in
this chapter.
• You have removed the system unit cover.
• You can replace or reinstall a part by performing the removal procedure in
reverse order unless additional information is provided.
Recommended Tools
Most of the procedures in this chapter require the use of one or more of the following tools:
•
•
•
•
•
•
Small flat-blade screwdriver
Wide flat-blade screwdriver
Number 1 and number 2 Phillips-head screwdrivers
Chip-removal tool
1/4-inch nutdriver
Tweezers or long-nose pliers
Also, use a wrist grounding strap as explained in the next section, “Precautionary Measures.”
Removing and Replacing Parts
4-1
Precautionary Measures
Before you perform any of the procedures in this chapter, take a few moments
to read the following warning for your personal safety and to prevent damage to
the computer system from ESD.
WARNING FOR YOUR PERSONAL SAFETY
AND PROTECTION OF THE EQUIPMENT:
Before you start to work on the computer, perform the following steps in
the sequence indicated.
1. Turn off the system unit and any attached peripherals.
2. Disconnect the system unit and any attached peripherals from their
power sources to reduce the potential for personal injury or shock.
3. Wear a wrist grounding strap, and clip it to an unpainted metal surface, such as the system power supply’s fan guard, on the chassis.
If a wrist grounding strap is not available, touch the fan guard or
some other unpainted metal surface on the back of the system unit to
discharge any static charge from your body.
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Dell OptiPlex GXpro Systems Service Manual
Floor Stand
floor stand screw
Figure 4-1. Floor Stand Removal
To remove the floor stand, follow these steps:
1. Place left side of the system unit on a flat work surface.
2. Unscrew the floor stand screw.
Use your fingers or a wide flat-blade screwdriver to unscrew the floor stand
screw. The screw is captured and separated from the floor stand.
3. Pull the floor stand away from the system unit.
Disengage the three orientation nubs that position and help hold the floor
stand to the system unit.
Removing and Replacing Parts
4-3
System Unit Cover
front of system unit
securing
button
Figure 4-2. System-Unit Cover Removal
To remove the system unit cover, follow these steps:
1. Remove the padlock if one is installed.
back of system unit
Figure 4-3. Padlock Removal
2. Press in the two securing buttons until the cover is free to swing up.
3. Lift the cover, from the back, pivoting it toward the front of the system
unit.
Four plastic hooks on the inside of the front part of the cover secure it to the
chassis.
Before you reinstall the cover, fold all cables out of the way so that they do
not interfere with the cover or with the proper airflow inside the system unit.
4-4
Dell OptiPlex GXpro Systems Service Manual
Eject, Power, and Reset Buttons
system unit cover
(upside down)
reset button
eject button
power button
3.5-inch frontpanel insert
Figure 4-4. Eject, Power, and Reset Button Removal
To remove the eject, power, and reset buttons, follow these steps:
1. Lay the system unit cover upside down on a flat work surface, with the
back of the cover facing you.
2. To remove the 3.5-inch diskette-drive eject button, pull gently on the
plastic part of the button until it comes free.
3. To remove the power button or the reset button, use a small screwdriver and push in on the two or three plastic clips that hold the button
to the system unit cover. When these clips are released, the button
comes free from the front panel of the cover.
Removing and Replacing Parts
4-5
Front-Panel Inserts
system unit cover
(upside down)
post (2)
ring-tab (2)
5.25-inch frontpanel insert
Figure 4-5. Front-Panel Insert Removal
To remove a front-panel insert, follow these steps:
1. Lay the system unit cover upside down on a flat work surface, with the
back of the cover facing you.
2. For a 5.25-inch bay, pull the insert from the two retaining posts until
the ring-tabs are released (see Figure 4-5).
For the 3.5-inch bay, locate the spring-loaded back end of the eject
button mechanism. Press the mechanism toward the front panel to snap
the plastic insert out of its opening (see Figure 4-4).
To replace a front-panel insert for a 5.25-inch bay, position the insert over the
drive bay opening. Place the panel over the retaining posts, and then press hard
to get the ring-tabs over the posts. If necessary, use a 1/4-inch nutdriver to help
push the ring-tabs.
To replace the front-panel insert for the 3.5-inch bay, from outside the cover,
place the insert in position and press it into the opening.
4-6
Dell OptiPlex GXpro Systems Service Manual
Indicator Card
chassis hook (2)
indicator card
screw
indicator card
cable
speaker
connector
Figure 4-6. Indicator Card Removal
To remove the indicator card, follow these steps:
1. Remove the hard-disk drive bracket.
See “Drives” found later in this chapter.
2. Remove the speaker connector from the indicator card.
3. Disconnect the indicator cable from the system board.
Slide the indicator cable through the cable slot in the bottom of the chassis.
4. Remove the mounting screw holding the indicator card to the chassis.
5. Rotate the card to the left, and lift it out of the hooks holding it to the
chassis.
Removing and Replacing Parts
4-7
Speaker
speaker
connector
retaining slot
speaker
Figure 4-7. Speaker Removal
To remove the speaker, follow these steps:
1. Remove the hard-disk drive bracket.
See “Drives” found later in this chapter.
2. Remove the speaker connector from the indicator card.
3. Lift the speaker out of the retaining slots on the front of the chassis.
4-8
Dell OptiPlex GXpro Systems Service Manual
Drives
Figure 4-8 shows an example of drive hardware that can be installed in the system unit. Refer to this figure when you perform any of the procedures in the
following subsections.
DC power cable
two-bay
drive cage
diskette/tape drive
interface cable
3.5-inch diskette
drive
system
power supply
CD-ROM/tape drive
interface cable
hard-disk
drive bracket
power input
connectors
DSKT
connector
IDE2 connector
IDE1
connector
Figure 4-8. Drive Hardware
Removing and Replacing Parts
4-9
Drives in the Drive Cage
retaining screw
bracket mounting
screw (2)
hook (2)
bracket catch
Figure 4-9. 3.5-Inch Diskette Drive Removal
To remove a drive from the 3.5-inch diskette drive bay, follow these steps:
1. Disconnect the DC power cable and the interface cable from the back of
the drive.
2. Remove the bracket retaining screw.
3. Release the bracket catch from the chassis.
Rotate the drive bracket to the right, and lift the bracket from the top of the
drive bay.
4. Remove the two mounting screws from each side of the drive and
remove the drive from the bracket.
To replace a 3.5-inch diskette drive, locate the two hooks on the right side of the
bracket that hold the drive in position. Engage those two hooks in the side of the
drive.
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Dell OptiPlex GXpro Systems Service Manual
retaining tab (2)
Figure 4-10. 5.25-Inch Drive Removal
To remove a 5.25-inch drive from the middle or lower drive bay, follow these
steps:
1. Disconnect the DC power cable and the interface cable from the back of
the drive.
2. Press out on the two retaining tabs on the sides of the drive bay, slide
the drive forward, and remove it from the drive bay.
Removing and Replacing Parts
4-11
Hard-Disk Drives
handle
screw
hook (2)
hard-disk drive
bracket
Figure 4-11. Hard-Disk Drive Bracket Removal
To remove a hard-disk drive bracket, follow these steps:
1. Disconnect the DC power cable(s) and the interface cable(s) from the
back of the drive(s).
2. Remove the screw that secures the hard-disk drive bracket to the
chassis.
3. Grasp the handle on the front of the bracket, and rotate the bracket
back until it swings free from the chassis.
Disengage the bracket from the two hooks on the bottom of the chassis
support.
4. Lift the hard-disk drive bracket out of the system unit.
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Dell OptiPlex GXpro Systems Service Manual
drive-bracket
mounting screw (4)
hard-disk drive
hard-disk
drive bracket
Figure 4-12. Hard-Disk Drive Removal
To remove a hard-disk drive, follow these steps:
1. Remove the hard-disk drive bracket from the system unit.
See the preceding procedure.
2. Remove the four screws that secure the hard-disk drive(s) to the
bracket.
3. Slide the drive(s) out of the hard-disk drive bracket.
Removing and Replacing Parts
4-13
System Power Supply
power supply
securing
tab
DC power
cable (8)
slot
hook
system board
Figure 4-13. Power Supply Removal
To remove the system power supply, follow these steps:
1. Disconnect the AC power cable from the back of the power supply.
2. Disconnect the DC power cables from the system board, drives, and
expansion cards.
3. Free the system power supply from the securing tab labeled “RELEASE —>,”
and rotate it to the right until it stops.
Press the securing tab to the left to disengage the power supply.
4. Free the power cable bundle from the hook on the bottom of the chassis.
5. Lift the front end of the system power supply up, and move it to the
right to disengage the power supply from the slot in the chassis.
6. Lift the system power supply from the system unit.
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Dell OptiPlex GXpro Systems Service Manual
Microprocessor Fan
lock
microprocessor
fan connector
latching tab (4)
power cable
fan
Figure 4-14. Microprocessor Fan Removal
To remove the system power supply, follow these steps:
1. Rotate the power supply to the right to access the microprocessor fan
connector.
See “System Power Supply,” found earlier in this chapter.
2. Sqeeze the latch and pull out the fan power cable from the microprocessor fan connector located on the system board under the power
supply.
3. Gently pull the plastic lock, and push down on the fan to disengage the
four latching tabs holding the fan to the back of the chassis.
4. Remove the fan.
Pull the fan forward and out of the system unit.
Removing and Replacing Parts
4-15
System Board Components
The subsections that follow contain procedures for removing system board
components.
microphone jack
(NIC-IN)
speaker-out jack
(SPKR-OUT)
NIC
connector
(ENET)
serial port 2
USB
connector
connectors(2)
(SERIAL2)
(USB)
keyboard/mouse
connectors
(stacked)
(KYBD/MOUSE)
serial port 1/parallel
port connectors (stacked)
(PARALLEL/SERIAL)
microprocessor fan
connector (FAN)
line-in jack
(LINE-IN)
battery socket
(BATTERY)
riser board
power
connector
(RSR PWR1)
main power input
connector (POWER1)
riser board
connector
(RISER)
microprocessor socket
(MICROPROCESSOR)
DIMM sockets (4)
riser board
power
connector
(RSR PWR2)
secondary
microprocessor
card (or terminator card)
connector (2ND_CPU)
3.3-V power
input connectors
(POWER2)
CD-ROM
connector (CD_IN)
front of system unit
primary EIDE
interface connector (IDE1)
diskette/tape drive interface
connector (DSKT)
jumpers
control panel
connector (PANEL)
Figure 4-15. System Board Components
4-16
Dell OptiPlex GXpro Systems Service Manual
secondary EIDE interface
connector (IDE2)
Expansion Cards
The system unit has a removable expansion-card cage. The expansion cards
fit into connectors on a riser board. Dell recommends that you remove the
expansion-card cage first before removing or installing expansion cards.
Expansion-Card Cage
lever
expansioncard cage
notch
chassis
Figure 4-16. Expansion-Card Cage Removal
To remove an expansion-card cage, follow these steps:
1. Disconnect any cables from the expansion cards and the riser board.
2. Rotate the lever toward the back of the system unit until it stops in the
upright position.
3. Lift the expansion-card cage up and away from the system unit.
To replace an expansion-card cage, keep the cage flush against the chassis to
insure that the lever engages the notch when the lever is depressed.
Removing and Replacing Parts
4-17
Expansion Card
retaining screw
expansion card
card-mounting
bracket
expansion-card
connector
card-slot opening
riser board
Figure 4-17. Expansion-Card Removal
To remove an expansion card, follow these steps:
1. Remove the expansion-card cage.
See the preceding procedure.
2. Remove the retaining screw from the card-mounting bracket.
3. Grasp the expansion card by its corners, and carefully remove it from
the expansion-card connector.
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Dell OptiPlex GXpro Systems Service Manual
Riser Board
retaining screw (2)
slot (2)
expansion-card
cage
riser board
Figure 4-18. Riser Board Removal
To remove the riser board, follow these steps:
1. Remove the expansion-card cage and all expansion cards.
See the preceding two procedures.
2. On a flat work surface, turn the expansion-card cage over, with the
riser board facing you.
3. Remove the riser-board retaining screws.
4. Slide the riser board down approximately one-half inch to release the
board from the two slots on the expansion-card cage.
5. Lift the riser board away from the expansion-card cage.
Removing and Replacing Parts
4-19
DIMMs
DIMM
2.
securing clip (2)
1.
Figure 4-19. DIMM Removal
To remove a DIMM, push outward on the DIMM socket’s securing clips until
the DIMM is released from its socket. Then lift the DIMM away from the
socket.
DIMM
2.
securing clip (2)
1.
Figure 4-20. DIMM Installation
To replace a DIMM, press outward on the securing clips at each end of the
socket until they snap open. Orient the DIMM to the socket, and press the
DIMM straight down into the socket slot until the securing clips snap into place
around the ends of the DIMM.
4-20
Dell OptiPlex GXpro Systems Service Manual
Microprocessor/Heat Sink Assembly
heat sink
microprocessor
securing clip
hooks over tabs
on socket
(front and back)
microprocessor
socket
release lever
microprocessor
Figure 4-21. Microprocessor Securing Clip
To remove the microprocessor/heat sink assembly, follow these steps:
1. Remove the microprocessor securing clip from the microprocessor/heat
sink assembly.
WARNING: The microprocessor chip can get extremely hot during
system operations. Be sure the chip has had sufficient time to cool
before touching it.
Press down on the folded part of the clip with a small screwdriver to release
the clip.
2. Push outward and then upward on the microprocessor release lever to
rotate the lever to its fully vertical position.
3. Lift the microprocessor/heat sink assembly out of its socket (see
Figure 4-22).
To install the replacement microprocessor/heat sink assembly, ensure that the
microprocessor release lever is in its fully vertical position to allow the microprocessor pins to easily slip into the socket. When the microprocessor/heat sink
assembly is in place, rotate the microprocessor release lever to its horizontal
position. Hook the microprocessor securing clip over the socket tab nearest the
front of the system board, and then snap it over the tab on the back of the socket.
NOTE: Pin 1 on the microprocessor is located on the corner with the largest
bevel. The pin-1 hole in the microprocessor socket is located on the corner
where the holes are in a diagonal pattern.
Removing and Replacing Parts
4-21
securing clip
heat sink
thermal interface pad
microprocessor
microprocessor
socket
pin-1 corner of
socket
front tab
Figure 4-22. Microprocessor Removal
If you are installing a new microprocessor/heat sink assembly, you need to
place the thermal interface pad that comes with the replacement microprocessor
between the microprocessor and the heat sink before reinstalling the securing
clip.
4-22
Dell OptiPlex GXpro Systems Service Manual
Terminator or Add-In Card
The system unit may have a terminator card or a secondary microprocessor
(dual-processing systems) on an add-in card installed on the system board. This
section describes removing and replacing the terminator card and the add-in
card.
Terminator Card
handle
terminator card
Figure 4-23. Terminator Card Removal
To remove a terminator card, follow these steps:
1. Grasp the small white “handle” installed on the top of the card.
If a handle is not installed, use the handle that is in the upgrade kit with the
secondary microprocessor. Fit the handle over the top of the card so that the
nubs of the handle fit through two holes in the top of the card.
2. Pull straight up on the card to free it from the connector.
Removing and Replacing Parts
4-23
Add-In Card
mountingbracket edge
card guide
metal mounting
bracket
mounting-bracket
edge tab
Figure 4-24. Add-In Card Removal
To remove an add-in card, follow these steps:
1. Gently grip the card’s metal mounting bracket with both hands.
2. Pull up until the card is freed from the connector.
To reinstall the card, with the metal mounting bracket facing the left side of the
chassis, fit the edge of the bracket into the card guide attached to the back wall
of the chassis. Make sure that the bracket edge tab is below the bottom of the
guide.
4-24
Dell OptiPlex GXpro Systems Service Manual
System Battery
battery
BATTERY socket
Figure 4-25. System Battery Removal
To remove the system battery, follow these steps:
1. If possible, enter the System Setup program, and make a printed copy
of the System Setup screens.
2. Rotate the power supply out of the way.
See “System Power Supply” found earlier in this chapter.
3. Remove the battery.
Pry the battery out of its socket with your fingers or with a blunt, nonconducting object, such as a plastic screwdriver.
To replace the system battery, follow these steps.
WARNING: There is a danger of the new battery exploding if it is incorrectly installed. Replace the battery only with the same or equivalent
type recommended by the manufacturer. Discard used batteries according to the manufacturer’s instructions.
1. Orient the new battery with the “+” facing up. Insert the battery into its
socket and snap it into place.
Rotate the power supply back into position.
2. Start the System Setup program, and reset the Date and Time categories.
Also, compare the system configuration information with the copy of the
system configuration settings you made in step 1 of the removal procedure.
Restore any system configuration information that was lost while replacing
the battery.
Removing and Replacing Parts
4-25
System Board
screw
slot (7)
Figure 4-26. System Board Removal
To remove the system board, follow these steps:
1. Disconnect all cables from their connectors at the back of the
system unit.
2. Remove the expansion-card cage.
3. Remove the microprocessor fan.
4. Disconnect all cables from the system board.
Remove the hard-disk drive power cable(s). Slide any drives in the
5.25-inch bays toward the front of the system unit, but leave them cabled.
5. Remove the system board as follows:
a. Remove the screw that secures the system board to the bottom of the
system unit.
b. Slide the system board toward the front of the system unit approximately one-half inch to release the board from the seven slots in the
floor of the system unit.
c. Lift the system board out of the system unit.
If you are replacing a system board, remove the DIMMs, the microprocessor,
the terminator or add-in card, and the expansion-card cage from the old system
board and install them on the replacement board.
4-26
Dell OptiPlex GXpro Systems Service Manual
Appendix A
System Setup Program
T
his appendix describes the System Setup program, which is used to change
the system configuration information stored in NVRAM on the system board.
To enter the System Setup program, follow these steps:
1. Turn on (or reboot) the system.
2. Press <Ctrl><Alt><Enter> immediately after the monitor displays the
message Press <CTRL><ALT><ENTER> for System Setup.
If you wait too long, the operating system begins to load into memory, the
message disappears, and you cannot enter the System Setup program. Let the
system complete the load operation; then shut down the system and try again.
NOTE: To ensure an orderly system shutdown, consult the documentation
that accompanied the operating system.
System Setup Program
A-1
System Setup Screens
Dell Computer Corporation
System OptiPlex GXpro 200 Setup
Page 1 of 2
Time:
13:17:02
Diskette Drive A:
Diskette Drive B:
Drive A Location:
Drives:
Date:
Mon Jan 6, 1997
This category sets the time in
24-hour format (hours:minutes:
seconds) for the internal clock/
calendar.
3.5 inch, 1.44 MB
Not Installed
Top
To change the value in a field,
enter a number or use the leftor right-arrow key.
Primary
Type Cyls Hds Pre LZ Sec Size
Drive 0: Auto 524 32
-1 524 63 540
Drive 1: None
Secondary
Drive 0: Auto Packet Interface Device
Drive 1: None
Base Memory:
640 KB
Extended Memory:
63 MB
Reserved Memory:
None
Fast Video BIOS:
On
CPU Speed:
200 MHz
Tab,Shift-Tab change fields
Page 2 of 2
Microprocessor:
Level 2 Cache:
System Memory:
Service Tag:
change values
Alt-P next
Tab,Shift-Tab change fields
Alt-B reboot
BIOS Version: XXX
This category determines whether
keyboard-related error messages are
reported at system startup.
Microprocessor:
Level 2 Cache:
System Memory:
Service Tag:
change values Alt-P next
Figure A-1. System Setup Screens
Dell OptiPlex GXpro Systems Service Manual
Pentium Pro-200
512 KB Integrated
64 MB ECC EDO
XXXXX
Esc exit
Dell Computer Corporation
System OptiPlex GXpro 200 Setup
Report
Keyboard Errors:
Not Enabled
System Password:
Unlocked
Password Status:
Diskette First
Boot Sequence:
Not Enabled
Setup Password:
Mon-Fri 07:30
Auto Power On:
Regular
Power Management:
Integrated Devices
Sound:
On
NIC:
On
Mouse:
On
Serial Port 1:
Auto
Serial Port 2:
Auto
Parallel Port:
378h
Parallel Mode:
AT
IDE Hard Disk:
Auto
Diskette:
Auto
USB:
On
Speakers:
On
A-2
BIOS Version: XXX
Pentium Pro-200
512 KB Integrated
64 MB ECC EDO
XXXXX
Esc exit
Alt-B reboot
Table A-1. System Setup Categories
Category
Function
Time
Resets time on system’s internal clock.
Date
Resets date on system’s internal calendar.
Diskette Drive A
Diskette Drive B
Identifies type of diskette drives installed. Category options always match physical locations
of drives in system unit. Tape drives are not
reflected in these categories.
Drive A Location
Identifies which diskette drive is used as the
boot drive.
Drives:
Primary
Secondary
Identifies drives attached to the IDE1 and
IDE2 connectors on system board. Each EIDE
connector supports two EIDE drives (Drive 0
and Drive 1).
For EIDE hard-disk drives, the system provides an automatic drive-type detect feature.
To use this feature, highlight the appropriate
drive category and type a (for automatic).
If none of the supported drive types match the
parameters of the new drive, enter the parameters directly. To do so, highlight the
appropriate drive category (Drive 0 and Drive 1)
and type u to display User1. Press <Tab> to
highlight each of the parameter fields in succession, and enter the appropriate number for
each field.
NOTE: For EIDE devices such as EIDE
CD-ROM drives and EIDE tape drives that are
using the built-in EIDE controller, set the
appropriate Drive category to Auto.
Base Memory
Displays amount of memory available to
MS-DOS programs that do not use extended or
expanded memory.
Extended Memory
Displays amount of memory available as
extended memory.
System Setup Program
A-3
Table A-1. System Setup Categories (continued)
Category
Function
Reserved Memory
Designates a region of system board memory
that can be supplied by an expansion card.
This feature should not be enabled unless an
expansion card that requires special addressing
is installed.
Fast Video BIOS
Enables shadowing and caching the BIOS for a
video card installed in an expansion slot.
NOTE: Some video cards are not designed to
be shadowed or cached. If video problems
occur, try setting Fast Video BIOS to Off.
A-4
CPU Speed
Indicates processor speed at which system
boots—the processor’s rated speed or a slower
compatibility speed.
Num Lock
Determines whether keyboard’s Num Lock
mode is activated.
Keyboard Errors
Enables or disables reporting of keyboard
errors during POST.
System Password
Displays current status of system’s password
security feature. Also used to assign and verify
a new password.
Password Status
Provides an extra measure of system security
by letting you set the system password to
Locked or Unlocked.
Boot Sequence
Determines whether system boots from diskette (if present) or hard-disk drive.
Setup Password
Restricts access to System Setup program.
Dell OptiPlex GXpro Systems Service Manual
Table A-1. System Setup Categories (continued)
Category
Function
Power Management
With the Power Management category
enabled, DPMS monitors and most EIDE
drives automatically switch into low-power
mode during periods of system inactivity.
CAUTION: Before enabling this feature,
check the monitor documentation to make
sure the system has a DPMS-compliant
monitor. Otherwise, there is a risk of damaging the monitor.
NOTE: Not all EIDE hard-disk drives support
this feature. Enabling this feature for drives
that do not support it may cause the EIDE
drive to become inoperable until the system is
restarted and the Power Management category
is disabled.
Sound
Enables (On [default]) or disables (Off) the
audio controller.
NIC
Enables (On) or disables (Off) the network
interface controller.
Mouse
Enables or disables the built-in PS/2compatible mouse port.
Serial Port 1
Serial Port 2
Configures system’s built-in serial ports.
Parallel Port
Configures system’s built-in parallel port. The
port’s I/O address may be set to 278H, 3BCH,
or 378H. Otherwise, the port may be disabled.
Parallel Modes
Controls whether system’s built-in parallel port
acts as an AT-compatible (unidirectional) or
PS/2-compatible (bidirectional) port.
IDE Hard Disk
Enables system’s built-in EIDE hard-disk drive
interface.
Diskette
Enables system’s built-in diskette controller.
USB
Enables (On) or disables (Off [default]) the
USB connectors.
NOTE: This category appears only on GXpro
systems containing the 10/100-Mbps Ethernet
NIC.
Speaker
Enables on-board speaker.
System Setup Program
A-5
Table A-1. System Setup Categories (continued)
Category
Function
Microprocessor
Displays type of microprocessor installed.
Level 2 Cache
Displays size of level-2 cache memory in
microprocessor.
System Memory
Displays entire amount of installed memory
detected in system, except for memory on EMS
expansion cards.
If EDO DIMMs are installed, EDO is displayed next to this category.
A-6
Service Tag
Displays system’s five-character service tag
number.
Asset Tag
Displays the asset tag number up to ten characters if one is assigned.
Dell OptiPlex GXpro Systems Service Manual
Index
Numbers
3.3-V power input connectors, 1-12, 4-16
CD-ROM
connector, 1-12
drives, 4-11
chassis, 1-4
computer, technical specifications, 1-16
A
configuration jumpers, location, 1-12, 4-16
add-in card, removal, 4-24
connectors
location on back of system unit, 1-4
location on system board, 1-12, 4-16
audio controller, 1-6
cover, system unit, removal, 4-4
B
D
battery
illustrated, 4-25
removing and replacing, 4-25
socket, 1-12, 4-16
DC power, 1-4, 1-8, 1-10
beep codes, 3-1
DC power distribution
diagram, 1-11
AC power receptacle, 1-4
BIOS chip, 1-12, 4-16
boot routine, observing when troubleshooting, 2-3
bracket
hard-disk drive, 1-4, 4-12
C
cables
DC power, 1-4, 1-10
diskette/tape drive interface, 1-4
EIDE, 4-9
card-slot opening, 1-4, 4-18
DC power cables, 1-4
DC power connectors, 1-8
diagnostics, 2-5
DIMMs
about, 1-13
location, 1-12, 4-16
removal, 4-20
diskette drives
interface cable, 1-4
interface connector, 1-12, 4-16
removal, 4-10, 4-11
diskette-based diagnostics, 2-5
DREQ line assignments, 1-15
drive cage, 1-4, 4-10
drive hardware, 4-9
Index
1
drives, 1-17, 4-9
DSKT connector, 1-12, 4-16
dual-processing, 1-5
E
ECC DIMMs, 1-2
EDO DIMMs, 1-2, 1-13
H
hard-disk drive access indicator, 1-4
hard-disk drives
about, 1-6
bracket, 1-4, 4-12
connectors, 1-12, 4-9, 4-16
location, 1-4
removal, 4-13
help, getting, 2-6
EIDE connectors, 1-12, 4-9, 4-16
eject button
removal, 4-5
I
enhanced dual-interface EIDE subsystem,
IDE1 connector, 1-12, 4-9, 4-16
1-6
error messages, system, list of, 3-3
ESD, 4-2
expansion cards
card-slot opening, 1-4, 4-17, 4-18
connectors, 1-12, 4-16
removal, 4-18
expansion slots, 1-5
expansion subsystem, advanced, 1-5
IDE2 connector, 1-12, 4-9, 4-16
indicator card, removal, 4-7
indicators, 1-4
initial procedures, 2-1
initialization, error messages, 3-3
interface cables, 1-4
interrupt assignments, list of, 1-14
ISA expansion cards, 1-5, 1-12, 4-16, 4-17,
expansion-card cage
removal, 4-17
4-18
external visual inspection, 2-2
J
F
jumpers, list of, 1-14
fan connector, 1-12, 4-16
fatal error messages, 3-3
floor stand, removal, 4-3
front panel, 1-4
front-panel inserts, removal, 4-6
2
Dell OptiPlex GXpro Systems Service Manual
K
key combinations, to enter System Setup
program, A-1
keyboard connector
location, 1-4, 1-12, 4-16
L
Plug and Play expansion cards, 1-5
LINE-IN connector, 1-12, 4-16
line-in jack, 1-4, 1-12, 4-16
POST beep codes, 3-1
power button
location, 1-4
removal, 4-5
power distribution diagram, 1-11
M
power indicator, 1-4
memory, main, 1-2, 1-13
power input connectors, 1-12, 4-16
messages, error, 3-3
power supply, 1-8
cable configuration, 1-10
DC voltage ranges, 1-8
illustrated, 1-10
removal, 4-14
microphone jack, 1-4, 1-12
microprocessor
release lever, 4-21
removal, 4-21
secondary, removal, 4-23
socket, 1-12, 4-16
precautions, 4-2
microprocessor fan
removal, 4-15
R
mouse connector
location on back panel, 1-4
location on system board, 1-12, 4-16
reset button
location, 1-4
removal, 4-5
resource conflicts
eliminating, 2-5
N
NIC
description, 1-7
location, 1-4, 1-12
riser board
connector, 1-12
power connector, 1-12
removal, 4-19
S
P
secondary microprocessor, 4-23
padlock, 4-4
PANEL connector, 4-16
Panel connector, 1-12
serial port connectors, location, 1-4
SMART support, 1-8
parallel port connector
location, 1-4, 1-12, 4-16
sockets
battery, 1-12, 4-25
DIMM, 1-12, 4-16, 4-20
PCI expansion cards, 1-5, 1-12, 4-16, 4-17,
speaker, removal, 4-8
4-18
PCI video card, 1-6
specifications, technical, 1-16
SPKR-OUT connector, 1-12, 4-16
Index
3
subsystems
advanced expansion, 1-5
enhanced dual-interface EIDE, 1-6
main memory, 1-13
video memory, 1-12
switch, voltage selection, 1-4
system board
components removal, 4-16
illustrated, 1-12
jumpers, 1-13
location inside chassis, 1-4
removing and replacing, 4-26
troubleshooting
boot routine, interpreting, 2-3
external visual inspection, 2-2
initial procedures, 2-1
initial user contact, 2-1
internal visual inspection, 2-4
U
system board jumpers, 1-13
USB
description, 1-7
location, 1-4, 1-12
system error messages, list of, 3-3
user contact, initial, 2-1
system features, 1-2
system power supply, 1-8
System Setup program, A-1
system specifications, 1-16
system unit
cover, 4-4
floor stand removal, 4-3
orientation, 1-3
V
video connector
location, 1-4
video subsystem, 1-6
visual inspection
external, 2-2
internal, 2-4
voltage selection switch, 1-4
T
tape drives
interface cable, 1-4
interface connector, 1-12, 4-16
removal, 4-10, 4-11
technical specifications, 1-16
terminator card, removal, 4-23
thermal monitoring, 1-7
4
Dell OptiPlex GXpro Systems Service Manual