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Maintenance & Service Guide
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Product Description
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Illustrated Parts
Removal & Replacement
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Specifications
Welcome to the Presario 7800 Series and 5900T Maintenance and Service Guide. This online guide is
designed to serve the needs of those whose job it is to repair Compaq products. Many of the components of the
hardcopy MSG are contained in this online guide. The Notice contains the copyright and trademark information.
The Preface shows symbol conventions, Technician Notes and Serial Number locations on the unit.
Download a ZIP file of the complete MSG to local hard drive.
This MSG will be periodically maintained and updated as needed.
To report a technical problem, contact your Regional Support Center or IM Help Center.
For content comments or questions, contact the Editor.
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privacy and legal statement
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December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
Notice
The information in this guide is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR
TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED
HEREIN, NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING FROM THE FURNISHING, PERFORMANCE, OR USE OF THIS
MATERIAL.
This guide contains information protected by copyright. No part of this
guide may be photocopied or reproduced in any form without prior
written consent from Compaq Computer Corporation.
© 1998 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
Compaq, Presario Registered U. S. Patent and Trademark Office.
Microsoft, MS-DOS, and Windows are registered trademarks of
Microsoft Corporation.
Windows 95 is a trademark of Microsoft Corporation.
Windows 98 is a trademark of Microsoft Corporation.
The software described in this guide is furnished under a license
agreement or nondisclosure agreement. The software may be used or
copied only in accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered
trademarks of their respective companies.
Maintenance and Service Guide
Compaq Presario 7800 Series and 5900T
Personal Computers
© 2000 Compaq Computer Corporation
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Maintenance & Service Guide
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Symbols
The following words and symbols mark special messages throughout this guide.
WARNING: Text set off in this manner indicates that failure to follow directions in
the warning could result in bodily harm or loss of life.
CAUTION: Text set off in this manner indicates that failure to follow directions in the
caution could result in damage to equipment or loss of data.
IMPORTANT:
Text set off in this manner presents clarifying information or
specific instructions.
NOTE:
Text set off in this manner presents commentary, sidelights,
or interesting points of information.
Technician Notes
WARNING: Only authorized technicians trained by Compaq should repair this
equipment. All troubleshooting and repair procedures are detailed to allow only
subassembly/module level repair. Because of the complexity of the individual boards
and subassemblies, the user should not attempt to make repairs at the component
level or to make modifications to any printed circuit board. Improper repairs can
create a safety hazard. Any indications of component replacement or printed circuit
board modifications may void any warranty.
Serial Number
When requesting information or ordering spare parts, the computer serial number should be
provided to Compaq. The serial number can be found on the back of the computer next to the fan
grill and on the front bezel behind the drive access door.
Locating Additional Information
The following documentation is available to support this product:
●
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Compaq Presario documentation set
Introducing Windows 98 Guide
Service Training Guides
Compaq Service Advisories and Bulletins
Compaq QuickFind
Compaq Service Quick Reference Guide
Compaq Help Center
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Product Description
Product Description
Models and Features
CPU Controls & Lights
Keyboards
CPU Back Connectors
Digital Creativity
Imaging Center (DCIC)
Power Management
Power Cord
Requirements
privacy and legal statement
This section describes the models and features of the Compaq
Presario 7800 Series of personal computers. Use the navigation bar
at left to find specific features.
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Troubleshooting
Troubleshooting
Clearing CMOS
This section provides troubleshooting information for
Compaq Presario 7800 Series Personal Computers.
Power-On Self-Test (POST) messages appear in tables.
Power-On Self-Test (POST)
The message and code tables include a description of the
error, the probable cause, and the recommended action
Troubleshooting Without Diagnostics that should be taken to resolve the error condition.
Diagnostics Software
Adherence to the procedures and precautions described
in this section is essential for proper service.
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Illustrated Parts
System Unit
Mass Storage
This section provides illustrated parts and a reference for
spare parts numbers for Compaq Presario 7800 Series
Personal Computers.
Cables
When requesting information or ordering spare parts, the
computer serial number should be provided to Compaq. The
Modems
serial number is displayed on the back of the chassis and
Keyboards/Mouse behind the drive cover.
Boards
Monitors
Return Kits
Documentation
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Removal and Replacement
Removal Sequence
Preparation for Disassembly
This chapter provides general service information for Compaq Presario 7800
Series Personal Computers. Adherence to the procedures and precautions
described in this chapter is essential for proper service.
The topics discussed in this section include the following:
Serial Number Location
Chassis
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Mass Storage Devices
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Button Board
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Digital Creativity Imaging Center
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Option Card Retainer
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Graphics Board
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PCI Cards
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Memory
●
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
Electrostatic Discharge
Generating Static
Preventing Electrostatic Damage to Equipment
Preventing Damage to Drives
Grounding Methods
Grounding Workstations
Grounding Equipment
Recommended Materials and Equipment
Tool Requirements
Screws
Cables and Connectors
Electrostatic Discharge
A sudden discharge of static electricity from a finger or other conductor can
destroy static-sensitive devices or microcircuitry. Often the spark is neither felt
nor heard, but damage occurs. An electronic device exposed to electrostatic
discharge (ESD) may not be affected at all and will work perfectly throughout a
normal cycle. Or it may function normally for a while, then degrade in the internal
layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but in many
cases, the discharge contains enough power to alter device parameters or melt
silicon junctions.
Top
Generating Static
The accompanying table shows typical electrostatic voltages generated by
different activities.
Typical Electrostatic Voltages
Relative Humidity
Event
10%
40%
55%
Walking across carpet
35,000 V
15,000 V
7,500 V
Walking across vinyl floor
12,000 V
5,000 V
3,000 V
Motions of bench worker
6,000 V
800 V
400 V
Removing DIPS from plastic tubes
2,000 V
700 V
400 V
Removing DIPS from vinyl trays
11,500 V
4,000 V
2,000 V
Removing DIPS from Styrofoam
14,500 V
5,000 V
3,500 V
Removing bubble pack from PCBs
26,000 V
20,000 V
7,000 V
Packing PCBs in foam-lined box
21,000 V
11,000 V
5,000 V
NOTE: 700 volts can degrade a product.
Top
Preventing Electrostatic Damage to Equipment
Many electronic components are sensitive to ESD. Circuitry design and structure
determine the degree of sensitivity. The following proper packaging and
grounding precautions are necessary to prevent damage:
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●
Protect all electrostatic parts and assemblies with conductive or approved
containers or packaging.
Keep electrostatic sensitive parts in their containers until they arrive at
static-free stations.
Place items on a grounded surface before removing them from their
container.
Always be properly grounded when touching a sensitive component or
assembly.
Place reusable electronic-sensitive parts from assemblies in protective
packaging or conductive foam.
Use transporters and conveyors made of antistatic belts and metal roller
bushings. Mechanized equipment used for moving materials must be wired
to ground and proper materials selected to avoid static charging. When
grounding is not possible, use an ionizer to dissipate electric charges.
The accompanying table shows typical static-shielding protection levels afforded
by different protective packaging materials.
Static-Shielding Protection Levels
Method
Voltages
Antistatic Plastic
1,500
Carbon-Loaded Plastic
7,500
Metallized Laminate
15,000
Top
Preventing Damage to Drives
To prevent static damage to hard drives, use the following precautions:
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Handle drives gently, using static-guarding techniques.
Store drives in the original shipping containers.
Avoid dropping drives from any height onto any surface.
Handle drives on surfaces that have at least 1 inch of shock-proof foam.
Always place drives PCB-assembly side down on the foam.
Top
Grounding Methods
The method for grounding must include a wrist strap or a foot strap at a grounded
workstation. When seated, wear a wrist strap connected to a grounded system.
When standing, use foot straps and a grounded floor mat.
Top
Grounding Workstations
To prevent static damage at the workstation, use the following precautions:
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Cover the workstation with approved static-dissipative material.
Provide a wrist strap connected to the work surface and properly grounded
tools and equipment.
Use static-dissipative mats, heel straps, or air ionizers to give added
protection.
Handle electrostatic sensitive components, parts, and assemblies by the
case or PCB laminate. Handle them only at static-free workstations.
Avoid contact with pins, leads, or circuitry.
Turn off power and input signals before inserting and removing connectors
or test equipment.
Use fixtures made of static-safe materials when fixtures must directly
contact dissipative surfaces.
Keep work area free of nonconductive materials such as ordinary plastic
assembly aids and Styrofoam.
Use field service tools that are conductive, such as cutters, screwdrivers,
vacuums.
Use a portable field service kit with a static-dissipative vinyl pouch that
folds out of a work mat. Also use a wrist strap and a ground cord for the
work surface. Ground the cord to the chassis of the equipment undergoing
test or repair.
Top
Grounding Equipment
Use the following equipment to prevent static electricity damage to the
equipment:
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Wrist straps are flexible straps with a minimum of 1 mega ohm ± 10%
resistance to the ground cords. To provide proper ground, a strap must be
worn snug against the skin. On grounded mats without banana-plug
connectors, connect a wrist strap with alligator clips.
Heelstraps/toestraps/bootstraps can be used at standing workstations and
are compatible with most types of boots and shoes. On conductive floors or
dissipative floor mats, use them on both feet with a minimum of 1 mega
ohm resistance between operator and ground. To be effective, the
conductive strips must be worn in contact with the skin.
Top
Recommended Materials and Equipment
Other materials and equipment that are recommended for use in preventing static
electricity include:
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Antistatic tape
Antistatic smocks, aprons, or sleeve protectors
Conductive bins, and other assembly or soldering aids
Conductive foam
Conductive tabletop workstations with ground cord of 1 mega ohm
of resistance
Static-dissipative table or floor mats with hard tie to ground
Field service kits
Static awareness labels
Wrist straps and footwear straps providing 1 mega ohm (±10%) resistance
Material-handling packages
Conductive plastic bags
Conductive plastic tubes
Conductive tote boxes
Metal tote boxes
Opaque shielding bags
Transparent, metallized shielding bags
Transparent shielding tubes
Top
Tool Requirements
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Torx T-8, T-10, and T-15 screwdrivers
Needle-nose pliers
Flat-blade screwdriver
Diagnostics software
Top
Screws
The screws used in these products are not interchangeable. If an incorrect screw
is used during the reassembly process, it could cause damage to the unit.
Compaq strongly recommends that all screws removed during the disassembly
process be kept with the part that was removed, then returned to their proper
locations.
IMPORTANT:
As each subassembly is removed from the computer, it should be
placed away from the work area to prevent damage.
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Top
Cables and Connectors
Most cables used throughout the unit are ribbon cables. These cables must be
handled with extreme care to avoid damage.
Apply only the tension required to seat or unseat the cables during insertion or
removal from the connector. Handle cables by the connector whenever possible.
In all cases, avoid bending, twisting, or tearing the cables, and ensure that cables
are placed in such a way that they cannot be caught or snagged by parts being
removed or replaced.
CAUTION: When servicing these computers, ensure that cables are
placed in their proper location during the reassembly process.
Improper cable placement can cause severe damage to the unit.
Optical Drive
Digital Creativity Imaging Center
3.5-Inch Hard Drive
Zip Drive
Diskette Drive
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Jumper and Switch Information
Jumper & Switch
Information
7800 and 5900T Models
with Pentium III System
Board
Mass Storage
3.5-Inch Hard Drive
5.25-Inch Hard Drive
DVD Drive
CD Drive
privacy and legal statement
This section contains jumper and switch information for
system board jumpers, system I/O board connectors, and
Mass Storage drives.
Click on a selection on the left navigation bar for jumper
and switch information.
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Specifications
Compaq Presario 7800 Series Personal Computer specifications are
listed in the following tables. Select the specification you are interested
in from the navigation bar in left column.
Specifications
System
Specifications
Video Memory
System Interrupts
System I/O
System Memory
System DMA
Power Supply
Diskette Drive
DVD Drive
IDE Hard Drives
Mouse
Fax/Modem
CD-RW Drive
System Specifications
U. S.
Outside U. S.
Height
19.0 in
482.60 mm
Depth
20.9 in
530.86 mm
Width
8.38 in
212.73 mm
Weight
31 lb
14.09 kg
Gross
41 lb
18.64 kg
Average Net
31 lb
14.09 kg
Nominal Line Voltage
100 to 120 VAC
220 to 240
VAC
Range Line Voltage
90 to 132 VAC
180 to 264
VAC
Line Frequency
47 to 63 Hz
47 to 63 Hz
Input Current (S)
5.2 at 90 VAC
3.6 at 180
VAC
Input Current (A)
8.0 at 90 VAC
4.0 at 180
VAC
Steady State (S)
200 W at 50° C
235 W at 25° C
200 W at
50° C
235 W at
25° C
Steady State (A)
200 W at 50° C
250 W at 25° C
200 W at
50° C
250 W at
25° C
Operating
50° to 95° F
10° to 35° C
Shipping
-4° to 140° F
-20° to 60°
C
Operating
8% to 90%
8% to 90%
Non-operating
5% to 95%
5% to 95%
Operating
10,000 ft
3048 m
Nonoperating
30,000 ft
9144 m
Dimensions
Shipping Weight
Input Requirements
Power (watts)
Environmental Requirements
Temperature
Humidity (noncondensing)
Maximum Altitude (unpressurized)
5 PCI
1 AGP
Expansion Slots
*This number will increase if more bay/slots are occupied.
Top
Diamond Stealth III S540 Video Memory
Resolution
Color Depth (bpp)
Vertical Refresh (Hz)
640 × 480
8, 16, 32
60, 72, 75, 85, 160
800 × 600
8, 16, 32
60, 72, 75, 85, 160
1024 × 768
8, 16, 32
60, 72, 75, 85, 160
1152 × 864
8, 16, 32
75
1280 × 1024
8, 16
60, 75, 85, 100
1280 × 1024
32
60, 75, 85
1600 × 1200
8, 16
60, 75, 85
1600 × 1200
32
60
* The Compaq FP720 display supports a maximum resolution of 1024x768 and
only supports the 60 Hz refresh rate. The Compaq Presario MV520 Multimedia
Monitor supports a maximum resolution of 1024x768, which is displayed only at
the 60 Hz refresh rate. The Compaq Presario MV720 Multimedia Monitor
supports a maximum resolution of 1280x1024, which is displayed only at the 60
Hz refresh rate. The Compaq Presario MV920 Multimedia Monitor supports a
maximum resolution of 1600x1200, which is displayed at up to the 75 Hz
refresh rate.
Top
System Interrupts
Hardware IRQ System Function
IRQ 0
System Timer
IRQ 1
Keyboard
IRQ 2
Programmable Interrupt Controller
IRQ 3
ACPI IRQ Holder for PCI IRQ Steering; Conexant PCI Modem
Enumerator; NVIDIA GeForce 256; Creative SB Live!
IRQ 4
Communications Port (COM 1)
IRQ 5
Available
IRQ 6
Diskette Drive Controller
IRQ 7
ECP Printer Port (LPT 1)
IRQ 8
Real-Time Clock, System CMOS
IRQ 9
SCI IRQ used by ACPI bus
IRQ 10
ACPI IRQ Holder for PCI IRQ Steering; IEEE 1394 Controller
IRQ 11
ACPI IRQ Holder for PCI IRQ Steering; Accton EN1207D Series
PCI Fast Ethernet Adapter
IRQ 11
VIA Tech 3038 PCI to USB Universal Host Controller
IRQ 12
PS/2 Mouse
IRQ 13
Numeric Data Processor
IRQ 14
Primary IDE; PCI IDE Controller
IRQ 15
Secondary IDE; PCI IDE Controller
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Models and Features
The following tables list Compaq Presario 7800 Series Personal Computer models
and model-specific features.
Model
Processor
Memory
Speed
(MB)
(MHz)
Hard
Drive
(GB)
CD/DVD
Video
CD-RW Memory Fax/Modem
(MB)
7800
PIII
500/100
64
15
40x
n/a
16
S
7800
PIII
550/100
64
15
8x/10x/12xDVD
n/a
16
S
7800
PIII
550/100
64
15
40x
n/a
16
S
7800
PIII
600/133
64
17
8x/10x/12xDVD
n/a
16
S
7800
PIII
667/133
128
20
8x/10x/12xDVD CD-RW
16
S
CTO
Processor
Options Speed (MHz)
Memory
(MB)
64 SDRAM
Hard Drive
(GB)
10 (5400 RPM)
CD/DVD
40 x
PIII 533/133
NOTE:
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Modem codes:
D = 6 Mb Digital DSL/56k V.90
E = 56k V.90
S = 56k V.90 International
Video
CDMemory
RW
(MB)
8x
Fax/Modem
16 or 32 56K
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CPU Controls and Lights
Description
1
CD or DVD Manual Eject Button
2
CD or DVD Drive Activity Light
3
CD or DVD Load/Eject Button
4
Diskette Drive Eject Button and Drive Activity
Light
5
Zip Drive Eject Button and Activity Light*
6
Hard Drive Activity Light
7
Power Button
8
Power Status Light
* On select models
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Product Description
Easy Access Internet Keyboard
Easy Access Buttons
Internet Suite Buttons and Keyboard
Lights
Easy Access Buttons
1 Play/Pause
2 Rewind/Previous track
3 Fast forward/Next
track
4 Stop
5 Eject
6 Print
7 Launch favorite
application
8 Volume down
9 Mute
10 Volume up
11 Sleep
Top
Internet Suite Buttons
and Keyboard Lights
1 Instant E-Mail
2 Community
3 My Presario
4 Instant Internet
5 Instant Search
6 Online Marketplace
7 Retail Central
8 Number Lock Light
9 Caps Lock Light
10 Scroll Lock Light
Top
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CPU Back Connectors
Connector Pins
1
Power Connector
2
Scroll Mouse
3
Keyboard
4
Dual USB
5
Serial Port
6
Parallel Port
7
IEEE 1394 Connector
8
Game Port
9
Networking Interface Connector
10 Telephone line to wall outlet
11 Telephone line to telephone
12 Audio Line Out
13 Audio Line In
14 Microphone
15 SVGA Monitor Port
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Parallel
Connector Pin Assignments
Serial
This section contains the connector pin assignments for the Presario 7800 series
of personal computers.
Universal Serial Bus
(USB)
Keyboard
Mouse
VGA Monitor
MIDI/Joystick
Line-in
Speaker/Headphone
Out
Microphone
Phone Line to Wall
Phone Line to
Phone
DVD-Drive Data
Cable
Modem
Parallel Connector
Pin
Signal
Pin
Signal
1
Strobe*
10
Acknowledge*
2
Data Bit 0
11
Busy
3
Data Bit 1
12
Paper Out
4
Data Bit 2
13
Select
5
Data Bit 3
14
Auto Linefeed*
6
Data Bit 4
15
Error*
7
Data Bit 5
16
Initialize Printer*
8
Data Bit 6
17
Select In*
9
Data Bit 7
18-25
Signal Ground
* = Active low
Back to Top
Serial Connector
Connector
Pin Signal
1
2
3
4
5
6
7
8
9
Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Ready to Send
Clear to Send
Ring Indicator
Universal Serial Bus
Connector
Pin Signal
1
2
3
4
- Data
+Data
Ground
+5 VDC
Keyboard
Connector
Pin Signal
1
2
3
4
5
6
Data
Unused
Ground
+5 VDC
Clock
Unused
Mouse
Connector
Pin Signal
1
2
3
4
5
6
Data
Unused
Ground
+5 VDC
Clock
Unused
Back to Top
VGA Monitor
Connector
Pin
Signal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Red Analog
Green Analog
Blue Analog
Volume Up
Ground
Ground Analog
Ground Analog
Ground Analog
+5 VDC
Ground
Volume Down
DDC Data
Horizontal Sync
Vertical Sync
DDC Clock
MIDI/Joystick
Connector
Ext13.gif (3492 bytes)
Pin
Signal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
+5 VDC
Fire A (1)
X-Axis (1)
GND
GND
Y-Axis (1)
Fire B (1)
+5 VDC
+5 VDC
Fire A (2)
X-Axis (2)
MIDI Out
Y-Axis (2)
Fire B (2)
MIDI In
Back to Top
Line In
Connector
Connector
Stereo 1/8" Miniphone
Speaker/Headphone Out
Connector
Connector
Stereo 1/8" Miniphone
Microphone
Connector
Connector
Stereo 1/8" Miniphone
Phone Line to Wall Jack
Connector
Pin Signal
ext15r.gif (1764 bytes)
1
Unused
2
Tip
3
Ring
4
Unused
Phone Line to Phone
Connector
Pin Signal
1
2
3
ext15r.gif (1764 bytes)
4
Unused
Tip
Ring
Unused
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DVD Drive Data Cable
Pin
Signal
Pin
Signal
1
RESET
21
DMARK
2
GND
22
GND
3
DD7
23
-DIOW
4
DD8
24
GND
5
DD6
25
-DIOR
6
DD9
26
GND
7
DD5
27
IORDY
8
DD10
28
SPSYNC
9
DD4
29
-DMACK
10
DD11
30
GND
11
DD3
31
INTRQ
12
DD12
32
-IOCS16
13
DD2
33
DA0
14
DD13
34
-PDIA6
15
DD1
35
DA0
16
DD14
36
DAZ
17
DD0
37
-CS1FX
18
DD15
38
-C53FX
19
GND
39
-DASP
20
(KEY)
40
GNP
Internal Fax/Modem
Pin
Signal
Pin
Signal
1
Unused
4
Tip
2
Unused
5
Unused
3
Ring
6
Unused
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Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
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Troubleshooting
Clearing CMOS
If the power-on password
is not known, clearing
CMOS will disable the
power-on password. To
clear CMOS, complete the
following steps:
1. Complete the
preparation for
disassembly.
2. Remove the chassis.
Password Jumper Location
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3. To disable the
password, move the
jumper (1) at JP1
from 1-2 to 2-3.
4. Wait for 10 seconds.
5. Move the jumper (1)
at JP1 from 2-3 to 12.
6. Replace the chassis
and perform the
appropriate
troubleshooting.
United States
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Maintenance & Service Guide
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Troubleshooting
Power-On Self-Test (POST)
POST is a series of diagnostic tests that run automatically when the system is turned on. After
the computer is turned on, POST checks the following assemblies to ensure that the computer
system is functioning properly:
●
●
●
●
●
●
●
●
Keyboard
System board
Memory modules
Video memory
Diskette drive
Hard drive
CD (or DVD) drive
Power supply
POST also detects the type of mass storage devices installed in the computer.
If POST finds an error in the system, an error condition is indicated by an audible or visual
message.
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POST (Power-On Self-Test) Error Messages
An error message displays if the POST encounters a problem. This self-test will run automatically each time the
system is powered on. The self-test will check all assemblies within the computer and report any errors found.
Click on the desired error code for the probable cause of the error and a recommended course of action.
Diskette Drive A or B Error
Failing Bits nnn
Fixed Disk Controller Failure
Extended RAM failed at offset nnn
Fixed Disk 0 or 1 Failure
Incorrect Drive A Type
Invalid NVRAM Media Type
Keyboard Controller Error
Keyboard Error
Operating System Not Found
Parity Check 1
Parity Check 2
Real Time Clock Error
System Battery is Dead
System BIOS Shadowed
System Cache Error
System CMOS Checksum Bad
System RAM Failed at Offset, nnn
System Timer Error
UMB Upper Limit Segment Address
nnn
Video BIOS Shadowed
Diskette Drive A or B Error
Probable Cause
Recommended Action
Drive A: is present, but fails the BIOS POST diskette tests
1. Run Setup.
2. Replace the signal
cables.
3. Replace the drive.
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Extended RAM failed at offset nnn
Probable Cause
Recommended Action
Extended memory not working or not configured properly
1. Replace the memory
modules.
2. Replace the system
board.
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Failing Bits nnn
Probable Cause
Recommended Action
nnn is a map of the bits at the RAM address which failed the
memory test
1. Run Setup.
2. Replace the system
board.
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Fixed Disk 0 or 1 Failure
Probable Cause
Recommended Action
Hard drive is not working or configured properly
1. Run Setup.
2. Replace the signal cable.
3. Replace the hard drive.
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Fixed Disk Controller Failure
Probable Cause
Recommended Action
Hard drive is not working or configured properly
1. Run Setup.
2. Replace the system
board.
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Incorrect Drive A Type
Probable Cause
Recommended Action
Type of diskette drive A: not correctly identified
1. Run Setup.
2. Replace the diskette
drive.
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Invalid NVRAM Media Type
Probable Cause
Recommended Action
Problem with NVRAM (CMOS) access
Replace the system board.
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Keyboard Controller Error
Probable Cause
Recommended Action
Keyboard, I/O keyboard controller
(on system board) or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system
board.
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Keyboard Error
Probable Cause
Recommended Action
Keyboard, I/O keyboard controller
(on system board) or mouse error
1. Replace the keyboard.
2. Replace the mouse.
3. Replace the system
board.
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Operating System Not Found
Probable Cause
Recommended Action
Operating system cannot be located on
either drive A: or C:
Run Setup.
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Parity Check 1
Probable Cause
Recommended Action
Parity error found in the system bus
1. Run Setup.
2. Replace the memory
modules.
3. Replace the system
board.
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Parity Check 2
Probable Cause
Recommended Action
Parity error found in the I/O bus
1. Run Setup.
2. Replace the ISA board
(modem).
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Real Time Clock Error
Probable Cause
Recommended Action
Real-time clock fails BIOS test
Replace the system board.
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System Battery is Dead
Probable Cause
Recommended Action
RTC battery is dead
1. Replace the RTC battery.
2. Run Setup.
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System BIOS Shadowed
Probable Cause
Recommended Action
System BIOS copied to Shadow RAM
Replace the system board.
Status message only; no
action required.
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System Cache Error
Probable Cause
Recommended Action
RAM cache failed the BIOS test
Run Setup.
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System CMOS Checksum Bad
Probable Cause
Recommended Action
CMOS is corrupted or modified incorrectly
Run Setup.
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System RAM Failed at Offset, nnn
Probable Cause
Recommended Action
System RAM failed
Replace memory modules.
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System Timer Error
Probable Cause
Recommended Action
DMA, timers, etc.
Replace the system board.
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UMB Upper Limit Segment Address nnn
Probable Cause
Recommended Action
Displays the address nnn of the upper limit
of Upper Memory Blocks, indicating released segments of the
BIOS
Run Setup.
Status message only; no
action required.
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Video BIOS Shadowed
Probable Cause
Recommended Action
Video BIOS successfully copied to shadow RAM
Run Setup.
Status message only; no
action required.
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Maintenance & Service Guide
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Troubleshooting
Diagnostics Software
Two diagnostic software tools are available to assist in troubleshooting your Presario product:
●
●
Compaq Diagnostics for Windows is preinstalled on your system. To access Diagnostics for
Windows, click Start, point to Settings, then select Control Panel, and then double-click
Compaq Diagnostics.
Compaq Personal Computer Diagnostics, a DOS-based tool, is available for download from
the Compaq Web site at www.compaq.com.
Both tools provide general system information, verify system functionality, test the system, and
identify possible defective components. Compaq Diagnostics for Windows provides specific
recommended actions in the case of failure.
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Troubleshooting
Troubleshooting Without Diagnostics
If you encounter some minor problem with the computer or software application, go through the
following checklist for possible solutions before running any of the Diagnostic utilities:
●
●
●
●
●
●
●
●
Is the computer connected to a working power outlet?
Is the computer turned on and the power light illuminated?
Are all cables connected properly and seated?
Are all of the necessary device drivers installed?
Is the CONFIG.SYS file correct?
Is the AUTOEXEC.BAT file (MS-DOS) or DOSSTART.BAT file correct?
Was a non-bootable diskette loaded in the diskette drive at power-up?
Are all CMOS settings correct?
Click on a selection below to identify some quick checks for common problems.
Power
Monitor
CD Drive
USB
Diskette Drive
Hard Drive
DVD Drive
Resolving Hardware
conflicts
Solving Minor Problems
Problem
Possible Solution
Computer will not turn on
Ensure that the computer is connected to a working
power source.
Computer date and time display is
incorrect
The real-time clock (RTC) battery may need to be
replaced. See Removal and Replacement
Procedures.
Computer powered off automatically
1. The unit may be in Sleep. If the amber light on
the front bezel is on, then the unit is in Sleep.
2. The unit temperature may have been exceeded.
Check the fan for function and blockage.
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Solving Diskette Drive Problems
Problem
Possible Solution
Diskette drive light stays on
1. Diskette may be damaged. In Windows 95 or 98,
run ScanDisk. Click Start =>
Programs=>Accessories=> System
Tools=>Scandisk to check for problems.
2. Diskette is incorrectly inserted. Remove the
diskette and reinsert.
3. Software program may be damaged. Check the
program diskettes.
4. Drive cable is not properly connected. Reconnect
the drive cable.
Diskette drive cannot write to a
diskette
1. Diskette is not formatted. Format the diskette.
2. Diskette is write-protected. Use another diskette
that is not write-protected, or disable the write
protection on the diskette.
3. Writing to the wrong drive. Check the drive letter
in your path statement.
4. Not enough space is left on the diskette. Use
another diskette.
Diskette drive cannot read a diskette
1. Diskette is not formatted. Format the diskette.
2. Using the wrong diskette type for the drive type.
Use a diskette that is compatible with the drive.
3. Reading the wrong drive. Check the drive letter in
your path statement.
4. Diskette drive has been disabled by Setup. Run
Setup and enable the diskette drive.
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Solving Monitor Problems
Problem
Possible Solution
Dim characters
1. The brightness and contrast controls are not set
properly. Adjust the brightness and contrast
controls.
2. Cables are not properly connected. Check that the
video cable is securely connected to the video card
and the monitor.
3. The RGB switch on the back of the monitor is
incorrectly set. Set the RGB switch (and sync
options, if this option is available) to 75 ohms, with
the sync set to "external." Refer to the
documentation included with the monitor.
Blank screen
1. Monitor is not turned on and the monitor light is
not on. Turn on the monitor and check that the
monitor light is on.
2. An energy saver feature has been enabled. Press
any key or click the mouse button, and if it is set,
type your password.
3. The brightness needs adjusting. Adjust the
brightness control.
4. System is in Sleep mode. Press the Sleep button
to wake up.
5. The cable connections are not correct. Check the
cable connection from the monitor to the computer
and to the electrical outlet.
Garbled characters on the screen
are mixed with text
Check the monitor connection. Ensure that the
monitor is capable of supporting the resolution that
the computer is using. If using the DOS
environment, you may need the ANSI.SYS driver.
Add the ANSI.SYS driver to the CONFIG.SYS file by
inserting the following line:
DEVICE = C:\ANSI.SYS
Monitor overheats
There is not enough ventilation space for proper
airflow. Leave at least 3 inches (7.6 cm) of
ventilation space. Also, be sure there is nothing on
top of the monitor to obstruct airflow.
Cursor will not move using the
arrow keys on the keypad
The Num Lock key is on. Press the Num Lock key.
The Num Lock light should not be on when you want
to use the arrow keys.
Video colors are wrong
The cable or monitor impedance is incorrect.
1. If you are using BNC cables, be sure that the Red,
Green and Blue BNC cables are connected to the
corresponding monitor connectors.
2. Be sure RGB inputs on the monitor are set to 75
ohms.
Blurry display or requested resolution
cannot be set
If the graphics controller was upgraded, the correct
display drivers may not be loaded. Install the display
drivers on the diskette included in the upgrade kit.
The picture is broken up, or it rolls,
jitters, or blinks
The monitor connections may be incomplete or the
monitor may be incorrectly adjusted.
1. Be sure the monitor cable is securely connected
to the computer.
2. If another monitor is in close proximity, move
them apart to be sure the electromagnetic field in
each monitor is not interfering with the other.
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Solving Hard Drive Problems
Problem
Possible Solution
Hard drive error occurs
Hard disk has bad sectors or has failed. Replace
hard drive.
Disk transaction problem
The directory structure is bad or there is a problem
with a file.
From the Windows desktop, click on the Start
button. Choose Programs=>Accessories => System
Tools=>Scandisk to check for problems.
If problems exist, run Scandisk and click on the
"Automatically fix errors" checkbox at the bottom to
correct the problems.
If a large number of lost allocation units is found,
click on the Start button. Choose Programs=>
Accessories=>System Tools=>Disk Defragmenter.
Drive not found
Cable could be loose. Check cable connections.
Nonsystem disk message
1. The system is trying to start from a diskette that
is not bootable. Remove the diskette from the
diskette drive.
2. The system is trying to start from the hard drive
but the hard disk has been damaged. Insert a
bootable diskette into the diskette drive and restart
the computer with Ctrl+Alt+Del.
3. Diskette boot has been disabled in Setup. Run
Setup and enable diskette boot.
Hard drive operation seems slow
The hard disk files may be fragmented.
From the Windows desktop, click on the Start
button. Choose Programs =>Accessories => System
Tools =>Scandisk to check for problems.
If problems exist, run Scandisk and checkmark the
"Automatically fix errors" box at the bottom to
correct the problems.
If a large number of lost allocation units is found,
click on the Start button. Choose Programs =>
Accessories=>System Tools=> Disk Defragmenter.
Hard drive activity light is not on,
or stays on without blinking
The hard disk files may be fragmented.
From the Windows desktop, click on the Start
button. Choose Programs=> Accessories => System
Tools=>Scandisk to check for problems.
If problems exist, run Scandisk and checkmark the
"Automatically fix errors" box at the bottom to
correct the problems.
If a large number of lost allocation units is found,
click on the Start button. Choose Programs=>
Accessories => System Tools=>Disk Defragmenter.
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Solving CD Drive Problems
Problem
Possible Solution
Cannot read compact disc
1. CD is not properly seated in the drive. Eject the
CD, press down on the CD firmly to correctly seat it
in the drive, then reload.
2. CD has been loaded upside down. Eject the CD,
turn it over, then reload.
3. CD may be dirty or scratched. Load another CD.
Cannot eject CD
CD is not properly seated in the drive. Turn off the
computer, insert a thin metal rod, such as a paper
clip, into the emergency eject hole, then push
firmly. Slowly pull the tray out from the drive until
the tray is fully extended, then remove the CD.
CD drive devices are not detected or
driver is not loaded
1. CD drive is not connected properly or not properly
terminated. Open the computer and check to see
that the drive cable is connected properly.
2. Ensure that the correct driver is installed in
CONFIG.SYS.
3. If drive has been changed, make sure the jumper
setting is set for cable select.
CD does not work in the DOS mode
Proper drivers are not loaded. Restart the system
and make sure the CD drive drivers are loaded.
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Solving DVD Drive Problems
Problem
Possible Solution
Cannot read DVD disk
1. DVD or CD is not properly seated in the drive.
Eject the DVD or CD, press down on the DVD or CD
firmly to correctly seat it in the drive, then reload.
2. DVD or CD disk may be dirty or scratched. Load
another DVD disk.
DVD movie does not work in the DOS
mode.
DVD will only operate as a CD drive. Make sure that
proper drivers are loaded. Restart the system and
make sure the Optical drive driver is loaded to
enable the DVD drive to operate as a CD drive.
Cannot eject DVD disk
1. The DVD, diskette, or hard drive was active when
attempting to eject the DVD. Wait until all drive
activity ends (the CD/hard drive light and diskette
drive light will go out), then try to eject the DVD.
Close the application that is using the CD/DVD, then
press eject.
2. The system is in the Sleep mode. Press the Power
button to bring the system back to full power, then
eject the DVD. NOTE: The system will not go into
Sleep mode while playing a DVD movie.
3. DVD disk is not properly seated in the drive. Turn
off the computer, insert a thin metal rod, such as a
paper clip, into the emergency eject hole, then push
firmly. Slowly pull the tray out from the drive until
the tray is fully extended, then remove the DVD
disk.
DVD drive devices are not detected;
driver is not loaded
1. DVD drive is not connected properly. Open the
computer and check to see that the drive cable is
connected properly.
2. Ensure that the correct driver is installed in
CONFIG.SYS.
3. If drive has been changed, make sure the jumper
setting is set for cable select.
Proper drivers are not loaded.
Restart the system and make sure the DVD drive
drivers are loaded.
DVD drive slow to start autorun CDs.
A DVD drive needs to identify the media descriptor
file from the CD/DVD and may take some time.
DVD will not start to play like a CD
DVDs are not autoplay like a CD. Go to the Desktop
and click on the DVD player icon.
DVD movie does not fill the screen
Generally, DVD media are dual-sided. One side
contains the full screen format, and the other has
the wide screen format. Eject the DVD movie and
place the appropriate format facing up.
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Solving for USB Problems
Problem
Possible Solution
USB device does not work with the
system.
The USB device and the system should interoperate.
Ensure that the correct driver is installed. Check
product documentation or the vendor's Web site for
updated drivers.
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Maintenance & Service Guide
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Illustrated Parts
System Unit
Click on a part to find the spare part number.
Illustrated Parts
System Unit
Mass Storage
Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Return Kits
Documentation
System Unit
Spare Part
Number
Description
1
Front bezel assembly
159768-001
2
Cover assembly
148941-001
3
Model logo plate
166183-001
4
Door drive bay assembly
Spared with
front bezel
assembly
5
Button board assembly
141011-001
6
DCIC cover
102370-001
7
Drive bay bezel blank 5.25-in
Spared with
front bezel
assembly
8
Floppy bezel
102369-001
9
Back I/O panel cover
10
Front I/O (DCIC) with cables
11
Cage assembly
12
Power supply
TBD
174775-001
122929-001
128017-001
13
Drive bay bezel blank 3.5-in
Spared with
front bezel
assembly
14
Hard drive/Diskette drive/Zip
drive cage
Not spared
separately
15
Option card retainer cover
shown)
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(not
174776-001
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Illustrated Parts
Mass Storage Devices
Illustrated Parts
System Unit
Mass Storage
Cables
Boards
Fax/Modems
Keyboards/Mouse
3.5-in 1.44 MB Diskette Drive
136436-001
Monitors
Zip Drive
135568-001
Return Kits
Documentation
3.5-in Hard Drive
DVD-ROM Drive, 8x/10x 157784-001
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10GB HD 168028-001
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Illustrated Parts
Cables
Illustrated Parts
System Unit
Mass Storage
Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Power Cord
Diskette Data Cable
327770-001
North America: 142766-001
Return Kits
Documentation
Fax/Modem Cable
Modem/Line Filter 334815-111
Audio CD-ROM Cable 149806-001
Hard Drive Single Data Cable 171288-001
Cables
Cables (not shown)
Spare Part Number
Modem Adapter Cable
340398-xxx. Click on the box to find the
dash number for the modem adapter
cable for a specific location.
Belgium -181
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Illustrated Parts
Boards for 7800 Models
and 5900T
An example of the type of board used is illustrated. Board may vary slightly from the one
shown.
Illustrated Parts
System Unit
Mass Storage
Cables
Boards
Fax/Modems
Keyboards
Monitors
Return Kits
Documentation
Boards
Spare Part
Number
Description
1 Processor,
PIII 500/100
PIII 600/133
PIII 667/133
2 133, 64MB SDIMM
133, 128MB SDIMM
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153840-001
170394-001
170395-001
170080-001
170081-001
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Illustrated Parts
Fax/Modems
Your modem may vary slightly from those shown.
Illustrated Parts
System Unit
Mass Storage
Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Return Kits
Documentation
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International Modem 56k V.90 - 166358-002 (S)
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Illustrated Parts
Keyboards/Mouse
Illustrated Parts
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Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Keyboards/Mouse
Description Spare Part
Numbers
Internet
Keyboard
387084-xxx. Click on the
box below to determine
the dash number for the
keyboard for a particular
location.
Return Kits
Documentation
US 003
Logitech scroll
334689-002
mouse
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Monitors
Illustrated Parts
System Unit
Compaq MV520 15-inch monitor
105782-001
Mass Storage
Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Return Kits
Compaq MV720 17-inch monitor
105784-001
Documentation
Compaq MV920 19-inch monitor
105786-001
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Illustrated Parts
Return Kit
Illustrated Parts
System Unit
Mass Storage
Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Return Kit
Documentation
Return Kits
Description
Spare Part
Number
Return Kit for 7800 series computers - North
America
128389-001
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Cables
Boards
Fax/Modems
Keyboards/Mouse
Monitors
Return Kits
Documentation
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Documentation and Software
Description
Spare Part
Number
Service Quick Reference
Guide (Qty 1)
162212-001
Service Quick Reference
Guide
(5 pack)
106854-001
Service Quick Reference,
Guide Quarterly Subscription
(Qty 1)
184960-001
Service Quick Reference
Guide, Quarterly
Subscription (5 pack)
184961-001
Quick Restore, Presario
7800-Australia
xxxxxx-01x
Quick Restore, Presario 7800Asia Pacific
xxxxxx-37x
Quick Restore, Presario
7800- Taiwan
xxxxxx-ABx
Quick Restore, Presario
7800-New Zealand
xxxxxx-APx
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Removal &
Replacement
Jumpers & Switches
Specifications
Preparing for Disassembly
To prepare the computer for the removal and replacement procedures, complete the following
steps:
1.
2.
Remove any diskette, compact disc (CD), or Digital Versatile Disk (DVD) from the
computer.
Turn off the computer and any peripheral devices that are connected to the computer.
CAUTION: Hold the power button for approximately four seconds or use the
shutdown command in Windows to turn off the system before you disconnect
any cables.
3.
4.
Disconnect the power cord from the electrical outlet, then from the computer.
Disconnect all peripheral device cables from the computer.
IMPORTANT:
During disassembly, label each cable as you remove it. Be sure to note
the position and routing of each cable before removal.
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Serial Number
The computer serial
number should be
provided to Compaq
whenever requesting
information or ordering
spare parts. The serial
number is located on the
back 1 and on the front of
the computer, behind the
drive cover (not shown).
Model may vary slightly from the one shown.
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Removal and Replacement
Removal Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Removing the
Chassis
1. Complete the
preparation for
disassembly procedures.
2. Remove five screws
from the back of the
computer.
3. Grasp the handle on
back of the computer
chassis, and pull back to
separate from cover.
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
Back to Removal and Replacement
privacy and legal statement
Replacement
To replace the chassis,
reverse the removal
procedure.
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal Sequence
Mass Storage
Devices Index
Chassis
Mass Storage Devices
Button Board
Digital Creativity Imaging Center
Option Card Retainer
1 Optical Drives*
2 Zip Drive
3 Diskette Drive
4 Hard Drive
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
privacy statement
legal notices
* Optical Drives refer to the CD,
CD-ROM, CD-RW, and DVD.
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Removing
the
Optical
Drive
Hard Drive
Mass Storage Devices
Index
1. Complete
preparation
for
disassembly
procedures.
2. Remove the
chassis.
3. Disconnect
audio, data,
and power
cables.
Next Step
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Removing
the Zip
Drive
Diskette Drive
Hard Drive
Mass Storage Devices
Index
1. Complete
the
preparation
for
disassembly
procedures.
2.
Remove the
chassis.
3. Disconnect
the data
and power
cables.
Next Step
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Hard Drive
Mass Storage Devices
Index
Removing
the Zip
Drive,
continued
4. Remove the
two screws
from the
right side
and the two
screws from
the left side
of the Zip
Drive.
5. Grasp the
Zip Drive
and remove
from the
drive bay.
Replacement
To replace
Zip Drive,
reverse the
removal
procedure.
Return to
Removal
and
Replacement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Hard Drive
Mass Storage Devices Index
Removing
the Optical
Drive,
continued
4. Remove two
screws from
the right
side and two
screws from
the left side
of the
Optical
Drive.
5. Remove the
Optical Drive
from the
drive bay.
Replacement
To replace
the Optical
Drive,
reverse the
removal
procedure.
Return to
Removal
and
Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Removing
the
Diskette
Drive
Hard Drive
Mass Storage Devices
Index
1. Complete
preparation
for
disassembly
procedures.
2. Remove
chassis.
3. Disconnect
the power
and data
cables.
Next Step
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Zip Drive
Diskette Drive
Hard Drive
Mass Storage Devices
Index
Removing
the
Diskette
Drive,
continued
4. Remove the
two screws
from the
right side
and the two
screws
from the
left side of
the diskette
drive bay.
5. Pull the
diskette
drive out of
the drive
bay.
Replacement
To replace
the diskette
drive,
reverse the
removal
procedure.
Return to
Removal and
Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Hard Drives
5.25-Inch drive The Compaq Presario 7800 Series Computers may be equipped with 5.25-Inch or 3.5-Inch form factor hard
drives. Refer to the disassembly instructions for the model you are servicing.
3.5-Inch drive
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass
Storage
Devices
Optical
Drive
Removing
the 5.25Inch Hard
Drive
Zip Drive
Diskette
Drive
Hard Drive
Mass
Storage
Devices
Index
privacy and legal statement
1. Complete the
preparation
for
disassembly
procedures.
2. Remove the
chassis.
3. Disconnect the
data and
power cables.
Next Step
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass
Storage
Devices
Optical
Drive
Zip
Drive
Diskette
Drive
Hard
Drive
Mass
Storage
Devices
Index
Removing the
5.25-Inch
Hard Drive,
continued
4. Remove the two
screws from the
chassis and the
two screws from
the Hard Drive
supports.
5. Slide the Hard
Drive forward
and lift up from
the chassis.
Replacement
To replace the
Hard Drive,
reverse the
removal
procedure.
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass Storage Devices
Optical Drive
Removing the 3.5Inch Hard Drive
Zip Drive
Diskette Drive
Hard Drive
Mass Storage Devices
Index
1. Complete the
preparation for
disassembly
procedures.
2. Remove the chassis.
3. Disconnect the data and
power cables.
Next Step
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Mass
Storage
Devices
Optical
Drive
Zip
Drive
Diskette
Drive
Hard
Drive
Mass
Storage
Devices
Index
Removing
the 3.5-Inch
Hard Drive,
continued
4. Remove the
two screws
from the right
side and the
two screws
from the left
side of the Hard
Drive supports.
5. Slide Hard
Drive inward to
remove from
chassis.
Replacement
To replace the
Hard Drive,
reverse the
removal
procedure.
Return to
Removal and
Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removing
the Button
Board
Removal
Sequence
Chassis
Mass Storage Devices
1. Complete
the
preparation
for
disassembly
procedures.
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
2. Remove the
chassis.
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
privacy and legal statement
System board may vary depending on model.
3. Disconnect
button
board
power/data
cable from
the system
board
(J10).
Next Step
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Parallel Port
Back I/O Panel
Power Supply
Removing
the Button
Board,
continued
4. Remove the
two screws
from button
board
assembly
and remove
assembly
from back of
the front
bezel.
Replacement
To replace
the button
board,
reverse the
removal
procedure.
NOTE:
Reconnect
the
power/data
cable with
the red wire
connected to
pin 1. Last
two pins on
left should
be exposed.
(See
previous
page for
graphic).
Return to
Removal
and
Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removing
the Digital
Creativity
Imaging
Center
(DCIC)
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
1. Complete
the
preparation
for
disassembly
procedures.
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
System board may vary depending on model.
2. Remove the
chassis.
3. Disconnect
the IEEE
1394 wire
cable (JP3)
and USB
ribbon cable
(JP4) from
the system
board.
Next Step
Replacement
To replace
the DCIC
cables,
reverse the
replacement
procedure.
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
Removing
the
Option
Card
Retainer
1. Complete
the
preparation
for
disassembly
procedures.
2. Remove the
chassis.
3. Remove the
two screws
from the
Option Card
Retainer
and remove
retainer
from
chassis.
Replacement
To replace
the Option
Card
Retainer,
reverse the
removal
procedure.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
Removing
the
Graphics
Board
1. Complete
the
preparation
for
disassembly
procedures.
2. Remove the
chassis.
3. Remove the
Option Card
Retainer.
4. Pull the
graphics
board and
bracket out
and to the
left to
remove
from the
chassis.
Replacement
To replace
graphics
board,
reverse the
removal
procedure.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removing
a PCI Card
Removal
Sequence
Chassis
1. Complete
the
preparation
for
disassembly
procedures.
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
2. Remove the
chassis.
Option Card Retainer
3. Remove the
Option Card
Retainer.
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
Illustration shows Fax/Modem card.
System Board Cables
System Board
NOTE:
Back I/O Panel
Power Supply
Location of PCI Cards are as follows:
●
●
●
●
Audio card in PCI slot 2
HPN card in PCI slot 3
NIC card in PCI slot 4
Fax/Modem card in PCI slot 5
Back to Removal and Replacement
privacy and legal statement
All PCI Cards (Fax/Modem, Audio, NIC, and
Home PNA) have the same removal
procedures.
4. Pull the PCI
Card out
and to the
left to
remove
from the
chassis.
Replacement
To replace the
PCI Card,
reverse the
replacement
procedure.
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
Removing
the
Memory
Module
1. Complete
the
preparation
for
disassembly
procedure.
2. Remove the
chassis.
3. Press
outward on
the release
latches
found on
both ends
of the Dual
Inline
Memory
Module
(DIMM).
4. Detach
memory
module
from slot.
Replacement
To replace
memory
module,
reverse the
removal
procedure.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Processor for 7800 Models and 5900T
Removing
the
Processor
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
1.
Complete
the
preparation
for
disassembly
procedures.
2.
Remove the
chassis.
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
CAUTION:
The
processor
may still be
very hot if
the
computer
has not
been
running
recently.
Processor
RTC Battery
System Board Cables
System Board
Processor may vary from the one shown.
Back I/O Panel
Power Supply
3.
Disconnect
heat sink
fan from
the system
board.
4.
Unlatch the
heat sink
clip from
the socket.
5.
Remove the
heat sink.
(NOTE: If
the heat
sink is
bonded
with
processor,
twist to
remove the
heat sink.)
6.
Lift up the
ZIF socket
handle (1),
remove the
processor
from the
socket (2).
Replacement
To reinstall
the
processor,
rub a
thermal
transfer
crayon on
the bottom
of the heat
sink, then
reverse the
steps
above.
NOTE: The
thermal
transfer
crayon
replaces the
thermal
pad.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal
Sequence
Chassis
Mass Storage Devices
Removing the RTC
Battery
1.
Perform the preparation
for disassembly procedure.
2.
Remove the chassis.
3.
Push out the socket lever
1 and slide the RTC
battery out of the socket
2.
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
Replacement
To replace the RTC
battery, reverse the
removal procedure.
System Board
Back I/O Panel
Power Supply
Back to Removal and Replacement
privacy and legal statement
WARNING: The
clock/CMOS lithium
battery may explode if
mistreated.
Do not abuse. Use only
replacement batteries
supplied by Compaq
Computer Corporation.
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Processor for 7800 Models
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board
Cables
System Board
Back I/O Panel
Power Supply
Back to Removal and Replacement
privacy and legal statement
Removing
the
System
Board
Cables
1. Parallel
port cable
connector,
J21 system
board
connector
2. Active
heatsink
cable, J15
system
board
connector
3. Power
supply
cable, J9
system
board
connector
4. 1394 cable,
JP3 system
board
connector.
5. USB cable,
JP4 system
board
connector.
6. Not used,
J11 system
board
connector.
7. Diskette
drive data
cable, J14
system
board
connectors.
8. CD/DVD
data cable,
J13 system
board
connector.
9. Hard drive
data cable,
J12 system
board
connector.
10.Button
board data
cable, J10
system
board
connector.
Replacement
To replace
the System
Board
Cables,
reverse the
removal
procedure.
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removing the System
Board
Removal
Sequence
Chassis
Mass Storage
Devices
1.
Complete the preparation
for
disassembly procedures.
2.
Remove the chassis.
3.
Remove the Graphics
Board.
4.
Remove the Fax/Modem.
5.
Remove Networking
Interface Card (on select
models only).
6.
Remove the Audio Card.
7.
Remove the Memory.
8.
Remove the Processor.
9.
Disconnect the System
Board Cables.
Button Board
Digital
Creativity
Imaging
Center
Option Card
Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System board may vary from the one shown.
System Board
Cables
System Board
Back I/O Panel
Power Supply
Be sure to remove
components
such as DIMMs and
NOTE: processor before replacing
the system board.
10.
Remove the nine screws
from the system board.
11.
Slide system board toward
drive bay and lift from the
computer.
Replacement
To replace the system
board,
reverse the removal
procedure.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Back I/O Panel may vary depending on model.
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Removing the Back
I/O Panel
1. Complete the
preparation for
disassembly
procedures.
2. Remove the chassis.
3. Remove the Graphics
Board.
4. Remove the
Fax/Modem.
System Board
5. Remove the
Networking Interface
Card (on select models
only).
6. Remove the Audio
Card.
Back I/O Panel
7. Remove the Memory.
Power Supply
8. Remove the Processor.
Processor
RTC Battery
System Board Cables
9. Disconnect System
Board Cables.
10. Remove the System
Board.
11. Push the back I/O
Panel into the chassis
from the back of the
chassis and remove.
Replacement
To replace the Back
I/O Panel, reverse the
removal procedure.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Removal
Sequence
Chassis
Mass Storage Devices
Button Board
Digital Creativity
Imaging Center
Option Card Retainer
Graphics Board
PCI Cards
Memory
Processor
RTC Battery
System Board Cables
System Board
Back I/O Panel
Power Supply
Removing
the Power
Supply
1. Complete
the
preparation
for
disassembly
procedures.
2. Remove the
chassis.
3. Remove
5.25-Inch
or 3.5-Inch
Hard Drive.
4. Disconnect
System
Board
Cables.
5. Disconnect
power
supply
cables from
CD/DVD,
Zip drive,
Diskette
and Hard
Drive.
6. Remove
Graphics
Board.
7. Remove the
Fax/Modem.
8. Remove
Networking
Interface
Card (on
select
models
only).
9. Remove the
Audio Card.
10. Remove the
Memory.
11. Remove the
Processor.
12. Remove the
System
Board.
13. Remove the
four screws
from the
back of the
unit and
one screw
from the
tab.
14. Slide the
power
supply
toward front
of unit and
down to
remove
from
chassis.
Replacement
To replace
the power
supply,
reverse the
removal
procedure.
Back to Removal and Replacement
privacy and legal statement
United States
December 31, 2002
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal &
Replacement
Jumpers & Switches
Specifications
Presario 7800 and 5900T Models with Pentium III
System Board
Jumper & Switch Information
Number
Function
Description
Reference
Designator
1
Secondary IDE
Drive
40-pin
J13
2
Diskette Drive
34-pin
J14
3
Primary IDE Drive
40-pin
J12
4
Not used
5
Secondary fan
connector
6
Button Board
20-pin
J10
7
CMOS
3-pin
JP1
8
Battery Socket
Battery
holder
BT1
9-13
PCI Slots
32-bit PCI
connector
PCI 1 to 5
14
AGP Slot
Connector
AGP1
15
Slot 1
321-pin PGA J18
16
Front side bus
four, 2-pin
jumpers
JP5-7*
17
Heat sink fan
connector
3-pin
J15
18-20
DIMM Sockets
168-pin
DIMM
DIMM 1 to 3
21
IEEE 1394
10-pin
JP3
22
Front I/O panel
10-pin
JP4
23
Single front I/O
panel
30-pin
J11**
24
Mouse
Miniature 6J1
pin
25
Keyboard
Miniature 6J1
pin
26
Back USB
Dual 4-pin
J2
27
Serial Port
DSUB 9-pin
J4
28
Parallel Port
DSUB 25pin
J21
29
IEEE 1394
Connector
6-pin
J7
Fan
3-pin
Power Supply
20-pin
J9
Clock Multiplier
3, 2-pin
JP2
J20
* JP7 always set to the ON position. JP5, JP6, and JP8 always set to the OFF position.
** Single front I/O panel and USB and IEEE1394 connectors are not used concurrently.
Jumper Settings
●
●
Clearing CMOS
Frequency Selection (JP2)
Clearing CMOS JP1
CMOS
Normal
CMOS Clear
pins 1-2
pins 2-3
Top
Frequency Selection (JP2)
Pin (1- Pin (3- Pin (5- Pin (7Multiplier
2)
4)
6)
8)
FSB 66
MHz
FSB
100
MHz
FSB
133
MHz
2
ON
ON
ON
ON
133
200
266
3
ON
OFF
ON
ON
200
300
400
4
OFF
ON
ON
ON
266
400
533
5
OFF
OFF
ON
ON
333
500
667
5/2
ON
ON
OFF
ON
166
250
333
7/2
ON
OFF
OFF
ON
233
350
466
9/2
OFF
ON
OFF
ON
300
450
600
11/2
OFF
OFF
OFF
ON
366
550
733
6
ON
ON
ON
OFF
400
600
800
7
ON
OFF
ON
OFF
466
700
933
8
OFF
ON
ON
OFF
533
800
1066
Reserved
OFF
OFF
OFF
OFF
***
***
***
13/2
ON
ON
OFF
OFF
433
650
866
15/2
ON
OFF
OFF
OFF
500
750
1000
3/2
OFF
ON
OFF
OFF
100
150
200
2
OFF
OFF
OFF
OFF
133
200
266
Top
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Specifications
3.5-Inch Hard Drive
Back to Jumpers
5.25-Inch Hard Drive
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Specifications
Digital Versatile Disk Drive
Settings may vary depending on vendor.
Back to Jumpers
CD Drive
Settings may vary depending on vendor.
Back to Jumpers
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Specifications
Specifications
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables.
Select the specification you are interested in from the navigation bar.
Specifications
System
Specifications
Video Memory
System Interrupts
System I/O
System Memory
System DMA
Power Supply
Diskette Drive
DVD Drive
IDE Hard Drives
Mouse
Fax/Modem
CD-RW Drive
System Memory
Low Address
High Address
System Function
00000000
0009FFFF
Base Memory
000A0000
000CFFFF
NVIDIA GeForce 256
000E0000
000FFFFF
Base Memory
00100000
080FFFFF
Base Memory
08100000
0810FFFF
Conexant PCI Modem Enumerator
08110000
081100FF
Accton EN1207D Series PCI Fast Ethernet
Adapter
09000000
09FFFFFF
NVIDIA GeForce 256
09000000
0A0FFFFF
VIA Tech 8598 CPU to AGP Controller
0A000000
0A00FFFF
NVIDIA GeForce 256
10000000
17FFFFFF
VIA Tech 8598 CPU to AGP Controller
10000000
17FFFFFF
NVIDIA GeForce 256
08000000
0807FFFF
Standard Direct Video Memory
08080000
080FFFFF
Optional Direct Video Memory
08100000
7FFFFFFF
unused
80000000
80FFFFFF
Memory mapped I/O devices
81000000
FDFDFFFF
unused/System ROM aliases
FDFE0000
FDFFFFFF
System ROM (alias)
FE000000
FFFDFFFF
unused
FFFE0000
FFFFFFFF
System BIOS ROM
Top
System DMA
Default DMA
Function
DMA0
ECP Printer Port (LPT1)
DMA1
Creative SB16 Emulation
DMA2
Standard Floppy Disk Controller
DMA3
Available
DMA4
Direct Memory Access Controller
DMA5
Creative SB16 Emulation
DMA6
Available
DMA7
Available
Top
Power Supply
U. S.
Outside U. S.
Voltage Switch Setting
115 V
230 V
Nominal Line Voltage
115 VAC
230 VAC
Range Input Line
90 to 132 VAC
180 to 264 VAC
Frequency Range
47 to 63 Hz
47 to 63 Hz
Power Factor
0.55
0.55
Input Power
310 Watts
310 Watts
Input Current
6 at 90 VAC
3 at 180 VAC
Inrush Current
65 A at 115 VAC
(cold start)
65 A at 230 VAC
(cold start)
Holdup Time
16 ms from zero
16 ms from zero
crossing at 120 VAC crossing at 240 VAC
Steady State
200 Watts
200 Watts
Full Output Rating
To 122°F and 5,000
ft
To 90°F and 10,000
ft (derate linearly)
To 50°C and
1524 m
To 32°C and
3048 m (derate
linearly)
Minimum Load
1.4 A on + 5.0 V
output; 0.07 A on
12 V output
1.4 A on + 5.0 V
output; 0.07 A on
12 V output
Operating
50° to 122° F
10° to 50° C
Storage
-40° to 151° F
-40° to 66° C
Input Specifications
General Specifications
Ambient Temperature Range
Dielectric Voltage Withstand
Input to Ground
1500 VAC/1 second
Safety Standard
UL 1950; CSA 22.2 950; TUV/VDE EN 60
950 (VDE0805/11.91); EMKO-TSE (74SEC) 207/94
Input Transient Susceptibility
Common and Differential Mode
(superimposed on AC line)
2500 V, 1 us, damped sinusoid
600 V, 10 us pulse
Differential Mode
20% step change in AC input voltage
Top
Diskette Drive
Diskettes
Size (in)
3.5 (8.89 cm)
High Density (MB)
1.44
Low Density (KB)
720
Light
Green
Height
One-third
Bytes per Sector
512
Sectors per Track
High Density
18
Low Density
9
Tracks per Side
High Density
80
Low Density
80
Read/Write Heads
2
Average Seek Time (ms)
Track-to-Track
3
Average
94
Settling Time
15
Latency Average
100
Top
CD/DVD Drive
Dimensions
U. S.
Metric
Width
Height
Depth
5.74 in
1.68 in
8.23 in
14.60 cm
4.29 cm
20.80 cm
1.80 lb
0.9 kg
Weight
Applicable Disc Formats
DVD-5, DVD-9, DVD-10, DVD18
CD-ROM
CD-DA
CD-XA
Photo CD
CD-I Ready
CD-Bridge
CD-R
Mode 1 and Mode 2
Audio
Mode 2, Form 1 and 2
Single and Multiple Session
Block Size
CD-ROM Mode 0
CD-ROM Mode 1
CD-ROM Mode 2
DVD
2352 bytes
2352, 2340,2336, 2048 bytes
2352,2340, 2336, 2048 bytes
2048 bytes
Center Hole
15 mm diameter
Diameter
12 cm, 8 cm
Thickness
1.2 mm
Track Pitch
0.74 µm (DVD) 1.6 µm (CD-ROM)
Laser
Beam Divergence
Output Power
Type
Wave Length
53.5 degrees ± 1.5 degrees
5 mW
Semiconductor laser GaAIAs
650 nm ± 25 nm (DVD)
795 nm ± 25 nm (CD)
Access Time (Typical)
Random
Full Stroke
DVD:
< 180 ms
< 300 ms
CD:
< 120 ms
< 200 ms
Audio Output Level
Line Out
Headphone
1.0 V (RMS) at 47 kW
0.7 V (RMS) at 32 W
Cache Buffer
512 KB
Sustained Data Transfer Rate
150 KB/sec (single, CD-ROM
mode)
2100-4800 KB/sec (32× CAV CDROM mode)
4455-10800 KB/sec (8× CAV DVD
mode)
Interface Cable Length (Max)
18 in
Startup Time
< 10 sec
Stop Time
< 3 sec
Top
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Specifications
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables. Select the
specification you are interested in from the navigation bar.
Specifications
System Specifications
Video Memory
System Interrupts
System I/O
System Memory
System DMA
Power Supply
Diskette Drive
DVD Drive
IDE Hard Drives
Mouse
Fax/Modem
CD-RW Drive
IDE Hard Drives
10 GB
Compaq Spare Part
Number
Formatted Capacity
Physical (MB)
Logical (MB)
10 GB
15 GB
20 GB
30 GB
40 GB
168028- 168029- 170389-001
001
001
168031-001
168628001
173342-001
10020
10020
20020
20020
30020
30020
40020
40020
10005
15020
148.8241.9
66
66
66
148.8-241.9
66
113.9198.7
66
66
1.5
11.0
18.0
1.0
<0.9
<20
1
<0.9
<20
1.5
11.0
18.0
1.5
9.0
18.0
1.0
<9.0
<20.0
Disk Rotational Speed
(RPM)
5400
7200
5400
5400
5400
7200
Cylinders
Physical
Logical
16383
16383
19386
16383
19571
16383
15957
16383
33637
16383
19386
16383
Data Heads
Physical
Logical
3
16
2
16
1
16
6
16
4
16
8
16
307-512
63
309-539
63
325-560
63
Transfer Rate
Head (Mbits/sec)
Interface (Mbytes/sec)
Typical Seek Time
(including settling)
Single Track (mS)
Average (mS)
Full Stroke (mS)
Sectors per Track
Physical
Logical
307-512 325-560 312-576
63
63
63
Top
Mouse
U. S.
Metric
Dimensions
Height
Length
Width
1.48 in
4.76 in
2.44 in
37.5 mm
120.8 mm
62.0 mm
Weight
6.1 oz
131 g
Base Resolution
400 DPI
Tracking Speed
(maximum)
10 in/sec
25 cm/sec
32° F to 104° F
-4° F to 140° F
0° C to 40° C
-20° C to 60° C
Exceeds 300 miles
Exceeds 1 million
operations
Exceeds 483 km
Exceeds 1 million
operations
Temperature
Operating
Storage
Lifetime
Mechanical
Switch
Relative Humidity
10% to 90%, noncondensing
ESD
No soft errors through 10 kV;
No hard errors through 15 kV;
specific performance depends on host system
Top
Fax/Modem
Conexant HCF
Conexant HCF V.90 Conexant DSL
V.90 56K Data Fax 56K Data Fax PCI
PCI Modem
Modem (includes an
International DAA)
Maximum Data 56*
Speed (kbps)
56*
56*
Data
V.90, K56Flex, V.34,
V.32terbo, V.32bis,
V.32, V.22bis, V.22,
V.21, Bell 212A, Bell
103
V.90, K56Flex, V.34,
V.32terbo, V.32bis,
V.32, V23, V.22bis,
V.22, V.21, Bell
212A, Bell 103
V.90, K56Flex,
V.34,
V.32terbo,V.32bis,
V.32, V.22bis,
V.22, V.23, V.21,
Bell 212A, Bell
103
Error
Correction
V.42bis,V.42, LAPM, V.42, LAPM, and
and MNP 2-5
MNP 2-4
V.42 and MNP2-4
Fax
V.17 (14.4 kbps
transmission speed)
V.29, V.27ter, V.21
Channel 2, Class 1
command set,
Group III FAX
V.17 (14.4 kbps
transmission
speed) V.29,
V.27ter, V.21
Channel 2, Group
III, Class 1
interface
V.17 (14.4 kbps
transmission speed)
V.29, V.27ter, V.21
Channel 2, Group III
FAX, Class 1
interface
* Both K56flex and V.90 are designed only to allow faster downloads from either
K56flex or V.90 compliant digital sources. Maximum achievable download
transmission rates are currently unknown, may not reach 56kbps, and will vary
with line conditions.
Top
CD-RW Drive
Dimensions
U. S.
Metric
Width
Height
Depth
Weight
Applicable Read-Only Disc
CD-ROM
Mode 1
CD-ROM XA
Mode 2, Form 1 and Form 2
CD Digital Audio
CD Extra
CD-I
CD-I Ready
Mode 2, Form 1 and Form 2
Photo CD
Single and Multi Session
Video CD
Block Size (Read-Only Disc
Parameters)
CD-R Mode 1
2048, 2352 bytes
CD-R Mode 2, Form 1
2048, 2328, 2336, 2340, and 2352
bytes
CD-R Mode 2, Form 2
2328, 2336, 2340, and 2352 bytes
CD-DA
2352 and 2368 bytes
Applicable Writeable Disc
CD-ROM
Mode 1
CD-ROM XA
Mode 2, Form 1 and Form 2
CD Digital Audio
CD-I
Mode 2, Form 1 and Form 2
Video CD
CD-Text
Block Size (Writeable Disc
Parameters)
CD-RW Mode 1
2048 bytes
CD-RW Mode 2, Form 1
2048 and 2352 bytes
CD-RW Mode 2, Form 2
2352 bytes
CD-DA
2352 bytes
Center Hole
15 mm diameter
Diameter
12 cm, 8 cm
Thickness
1.2 mm
Track Pitch
1.6 µm
Laser
Access Time
Random
Full Stroke
150 ms (typical)
350 ms (typical)
Audio Output Level
Line Out
Headphone
Cache Buffer
Sustained Data Transfer Rate
1.0 V (RMS) at 47 kW
0.7 V (RMS) at 32 W
1 Mbyte (minimum)
●
●
●
300 KB/s (2X) CD-ROM, CDR, CD-RW Read, CD-R, CDRW Write
600 KB/s (4X) CD-ROM, CDR, CD-RW Read, CD-R Write
Variable 1500 to 3600 KB/s
(10X to 24X) CD-ROM, CD-R
Read
Interface Cable Length (Max)
18 in
Startup Time
< 7 sec (single, typical)
< 30 sec (multisession, typical)
Stop Time
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Specifications
Compaq Presario 7800 Series Personal Computer specifications are listed in the following tables.
Select the specification you are interested in from the navigation bar.
Specifications
System
Specifications
Video Memory
System Interrupts
System I/O
System Memory
System DMA
Power Supply
Diskette Drive
DVD Drive
IDE Hard Drives
Mouse
Fax/Modem
CD-RW Drive
System I/O
Low I/O
Address
High I/O
Address
0000
000F
DMA Controller #1
0010
001F
DMA Controller Aliases
Function
0020
Interrupt Controller #1 Control Register
0021
Interrupt Controller #1 Mask Register
0022
003D
Interrupt Controller Aliases
0040
0043
Counter/Timer
0044
004F
0050
0053
0053
005F
Counter/Timer Aliases
0060
Keyboard Controller Data Register
0061
Port B: SERR/IOCHK NMI, Speaker, Refresh
0062
0063
0064
Keyboard Controller Command/Status
Register
Top
0065
006F
0070
NMI Mask Register (Bit 7)
0070
RTC/Configuration Memory Index Port (Bit
6:0)
0071
RTC/Configuration Memory Data Port
0072
RTC Extended Index
0073
RTC Extended Data
0074
007F
0080
008F
DMA Page Registers
0090
0091
Alias of DMA page registers if SOUTH
BRIDGE.4C.7=0
0092
0093
Port 92 (fast reset and A20 gate)
009F
Alias of DMA page registers if SOUTH
BRIDGE.4C.7=0
00A0
Interrupt Controller #2 Control Register
00A1
Interrupt Controller #2 Mask Register
00A2
00B1
00B4
00BF
00C0
00DF
DMA Controller #2
00E0
ESS Index Register
00E1
ESS Data Register
00E2
00E3
DDC2 Registers
00E4
00E5
Master I2C Interface
00E6
00E7
TV/MPEG Configuration Register
00E9
00EA
Ultra I/O Index Register
00EB
Ultra I/O Data Register
00EC
00EF
Modem configuration
00F0
00F1
Coprocessor Busy Clear/Reset
00F2
00F8
00F9
Lock Configuration Register (Dummy Write)
00FA
00FB
Unlock Configuration Register (Dummy Write)
00FD
00FF
0100
0101
0102
Video: POS. 102 register
0103
012F
0132
016F
0170
0177
0178
01EF
01F0
01F7
01F8
0200
Secondary IDE Controller
Primary IDE Controller
0201
0202
021F
0220
022F
0230
025F
0260
0263
0264
0277
0278
027F
0280
02E7
02E8
02EF
02F0
02F7
02F8
02FF
0330
0331
0332
036F
0370
0377
Reserved-Floppy Drive Controller 2
0378
037F
Parallel Port
0380
0387
0388
038B
038C
03B3
03B4
03B5
03B6
03B9
03BA
Reserved-Parallel Port
Reserved-Serial Port (COM4)
(COM2)
Video: Monochrome
Video: Monochrome
03BB
03BC
03BF
Reserved-Parallel Port
03C0
03CF
Video: VGA Registers
03D0
03D3
03D4
03D5
03D6
03D9
03DA
Video: Color
Video: Color
03DB
03E7
03E8
03EF
Reserved-Serial Port (COM3)
03F0
03F7
Floppy Disk Controller (Primary)
03F6
03F7
IDE Interface (Fixed Disk and CD-ROM)
03F8
03FF
Serial Port (COM1)
0400
04EF
04D0
Interrupt Controller #1 Edge/Level Control
04D1
Interrupt Controller #2 Edge/Level Control
04D2
0677
0678
067A
Parallel Port ECP Mode
0778
077A
Parallel Port ECP Mode
0CF8
PCI Configuration Index (32-bit I/O only)
0CFC
PCI Configuration Data
46E8
Video: Adapter Sleep
Top
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Digital Creativity Imaging Center
Description
1 USB (Universal Serial Bus) connector
2 IEEE 1394 connector
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Power Management Features
Compaq Presario 7800 Series Personal Computers use ACPI (Advanced Configuration and Power
Interface) for system power management. ACPI is an open industry specification that provides
reliable power management through improved hardware and operating system coordination.
The following is a list of the power management features:
●
●
●
●
●
●
●
Power Status Lights. You can quickly tell the sleep condition of the system by glancing at
the Power Status Lights on the unit or keyboard.
Automatic Sleep. In Windows 98, there are different Power Schemes under which the
system goes into Sleep mode automatically when it times out. The optional settings for
Windows 98 are Home/Office Desk, Portable/Laptop, and Always On. The system
supports different levels of power management for varying patterns of computer usage.
Default and Adjustable timeout settings. The default setting for Sleep timeout is 30
minutes. The Sleep timeout value can be set in the Control Panel by clicking the Power
Management icon. At the Properties screen, click System Standby, Turn off Monitor,
and Turn off Hard Disk to set the length of time before the system goes to sleep.
Manual Sleep. To manually put your computer into sleep mode in the Windows 98 desktop,
press the Sleep button (on the keyboard). The power status light on the CPU will light to
show that Sleep mode is activated.
Other manual standby options. Another way to put your computer into sleep mode
manually under Windows 98 is to select Start, then Shutdown. Select Standby from the list
of choices to put the system into Sleep mode. The system can then be turned off or left in
Sleep. When the Sleep button is pressed, the system returns to the previous Windows 98
Desktop state.
Wake-up events. Events that bring a system back to the working state include:
■
Pressing the Sleep button on the keyboard
■
Pressing the CPU Power button
■
Answering a call from Fax/Modem
Synchronized software and hardware volume control buttons.
Top
States of Power Management
Power management can be defined by three distinct power states in which the computer operates:
On, Off, and Sleep. The following table describes the power states and lists the power consumption
of each state:
Power Management States
Energy State
Description
Power Consumption
On
Power is available to the system. The
AC cable is connected, and the power
status light is green.
90 Watts avg., 110 Watts max
Off
Power is not available to the system
0 Watts
and the AC cable is disconnected. The
power status light is not lit.
Soft Off
Power is available to the system, the
AC cable is connected, and the power
status light is off.
1-2 Watts
Sleep
Power is available to the system, the
AC cable is connected, and the
computer is in a low power/standby
mode. The power status light is
amber.
27 Watts
Top
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Power Cord Set Requirements
The voltage select switch feature on the computer allows it to operate from any line voltage
between 120 and 240 volts AC.
The power cord set (flexible cord and wall plug) supplied with the computer meets the general
requirements for use in the country where the computer was purchased.
Power cord sets for use in other countries must meet the requirements of the country where the
computer is used. For more information on power cord set requirements, contact a Compaq
authorized dealer, reseller, or service provider.
General Requirements
The requirements listed below are applicable to all countries.
1. The length of the power cord set must be at least 6.00 feet (1.8 m) and no longer than 9.75
feet (3.0 m).
2. All power cord sets must be approved by an acceptable accredited agency responsible for
evaluation in the country where the power cord set will be used.
3. The power cord set must have a minimum current capacity of 10A and a nominal voltage
rating of 125 or 250 volts AC, as required by each country's power system.
4. To mate with the appliance inlet on the Switch Box, the appliance coupler must meet the
mechanical configuration of an EN 60 320/IEC 320 Standard Sheet C13 connector.
Country-Specific Requirements
Power Cord Set Requirements by Country
Country
Accredited
Agency
Australia
Applicable Note
Numbers
EANSW
1
Austria
OVE
1
Belgium
CEBC
1
Canada
CSA
2
DEMKO
1
Finland
SETI
1
France
UTE
1
Germany
VDE
1
Italy
IMQ
1
Japan
JIS
3
Norway
NEMKO
1
Sweden
SEMKO
1
Switzerland
SEV
1
United Kingdom
BSI
1
United States
UL
2
Denmark
NOTES:
1. The flexible cord must be <HAR> Type HO3VV-F, 3-conductor, 1.0 mm2 conductor size. Power
cord set fittings (appliance coupler and wall plug) must bear the certification mark of the agency
responsible for evaluation in the country where it will be used.
2. The flexible cord must be Type SJT-2 or equivalent, No. 18 AWG, 3-conductor. The wall plug
must be a two-pole grounding type with a NEMA 5-15P (15A, 125V) or NEMA 6-15P (15A, 250V)
configuration.
3. The appliance coupler, flexible cord, and wall plug must bear a "T" mark and registration
number in accordance with the Japanese Dentori Law. Flexible cord must be Type VCT or VCTF, 3conductor, 0.75mm2 conductor size. The wall plug must be a two-pole type with a Japanese
Industrial Standard C8303 (15A, 125V) configuration.
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Service Considerations - Optical Drive Cable Positions
Connect CD/DVD data cable
to system board connector
(J7 or IDE2).
Cable Positions
Optical Drive
If connecting CD/DVD and CDRW, use cable drive 0 to
CD/DVD and drive 1 to CDRW.
Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
Zip Drive
db.jpg (73195 bytes)
Diskette Drive
Service Considerations
Index Page
System board may vary from the one shown.
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Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Service Considerations - Digital Creativity Imaging Center Cable Positions
Connect the Digital Creativity
Imaging Center (or front I/O
panel) cable to system board
connector (J4 or USB2).
Cable Positions
Optical Drive
Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
dg.jpg (59140 bytes)
Zip Drive
Diskette Drive
Service Considerations
Index Page
System board and cable size may vary from the one shown.
Back to Removal and Replacement
privacy and legal statement
United States
January 2, 2003
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Service Considerations - 3.5-Inch Hard Drive Cable Positions
WARNING:
AC power
must be
disconnected.
Cable Positions
Optical Drive
Digital Creativity
Imaging Center
Connect the hard drive data
cable to system board
connector (J6 or IDE1).
3.5-Inch Hard Drive
5.25-Inch Hard Drive
dc.jpg (76079 bytes)
Zip Drive
Diskette Drive
Service Considerations
Index Page
System board may vary from the one shown.
Back to Removal and Replacement
privacy and legal statement
United States
January 2, 2003
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Service Considerations - 5.25-Inch Hard Drive Cable Positions
Connect the hard drive data
cable to system board
connector (J6).
Cable Positions
Optical Drive
If connecting a hard drive
and a zip drive, use cable
drive 0 to hard drive and
drive 1 to zip drive.
Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
de.jpg (76660 bytes)
Zip Drive
Diskette Drive
Service Considerations
Index Page
System board may vary from the one shown.
Back to Removal and Replacement
privacy and legal statement
United States
January 2, 2003
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Service Considerations - Zip Drive Cable Positions
Connecting Zip
Drive Cable
Cable Positions
Optical Drive
Without Use the same
CD-RW: cable to connect
the CD/DVD and
Zip drive.
Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
df.jpg (70984 bytes)
Zip Drive
Diskette Drive
Service Considerations
Index Page
Connect the data
cable drive 0 to
CD/DVD and drive
1 to Zip drive,
then connect to
system board (J7
or IDE2).
With CD- Use the same
RW:
cable to connect
the hard drive
and Zip drive.
Connect the data
cable drive 0 to
hard drive and
drive 1 to Zip
drive, then
connect to system
board (J6 or
IDE1).
Back to Removal and Replacement
privacy and legal statement
United States
January 2, 2003
Maintenance & Service Guide
Presario 7800 Series and 5900T Personal Computers
MSG Index
Product Description
Troubleshooting
Illustrated Parts
Home
Removal & Replacement
Jumpers & Switches
Specifications
Removal and Replacement
Service Considerations - Diskette Drive Cable Positions
Connect diskette drive data
cable to system board
connector (J5 or FDD1).
Cable Positions
Optical Drive
Digital Creativity
Imaging Center
3.5-Inch Hard Drive
5.25-Inch Hard Drive
dh.jpg (75273 bytes)
Zip Drive
Diskette Drive
Service Considerations
Index Page
System board may vary from the one shown.
Back to Removal and Replacement
privacy and legal statement