Service manual | Dell 2120 Personal Computer User Manual

Dell Latitude 2120 Service Manual
Working on Your Computer
Removing and Replacing Parts
System Setup
Diagnostics
Notes, Cautions, and Warnings
NOTE: A NOTE indicates important information that helps you make better use of your computer.
CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
If you purchased a Dell n Series computer, any references in this document to Microsoft Windows operating systems are not applicable.
Information in this document is subject to change without notice.
© 2010 Dell Inc. All rights reserved.
Reproduction of this material in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.
Trademarks used in this text: Dell™, the DELL™ logo, and Latitude™ are trademarks of Dell Inc. Intel®, Core™, and SpeedStep® are either
trademarks or registered trademarks of Intel Corporation. Microsoft®, Windows®, Windows Vista®, and the Windows Vista start button are either
trademarks or registered trademarks of Microsoft Corporation in the United States and/or other countries. Bluetooth® is a registered trademark
of Bluetooth SIG, Inc.
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 Inc. disclaims any
proprietary interest in trademarks and trade names other than its own.
June 2010 Rev. A00
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Battery
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Battery
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Slide the battery release latch into the unlock position.
3.
Slide and remove the battery from the computer.
Replacing the Battery
To replace the battery, perform the above steps in reverse order.
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Keyboard
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Keyboard
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the screws that secure the keyboard.
4.
Open the display and then push a flathead screwdriver through the screw socket from where you removed the keyboard screw.
5.
Starting in the top left corner of the keyboard, lift the keyboard up, and then flip the keyboard.
6.
Disconnect the keyboard data cable and remove the keyboard from the computer.
Replacing the Keyboard
To replace the keyboard, perform the above steps in reverse order.
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Access Panel
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Access Panel
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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4.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access-panel screws under the keyboard.
5.
Remove the access-panel screws on the bottom of the computer.
6.
Starting near the hinges, lift the access panel and remove it from the computer.
Replacing the Access Panel
To replace the access panel, perform the above steps in reverse order.
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Memory Modules
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Memory Modules
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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2.
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5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Pry the retention clips away from the memory module.
6.
Remove the memory module from the computer.
Replacing the Memory Modules
To replace the memory modules, insert the memory module in the memory slot at an angle, then press down the memory module to snap the memory module
in place.
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Coin-Cell Battery
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Coin-Cell Battery
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Disconnect the coin-cell battery cable from the system board.
6.
Remove the coin-cell battery.
Replacing the Coin-Cell Battery
To replace the coin-cell battery, perform the above steps in reverse order.
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WLAN Card
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the WLAN Card
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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2.
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5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Disconnect the WLAN antenna cables from the card.
6.
Remove the screw that secures the WLAN card to the system board.
7.
Remove the WLAN card from the computer.
Replacing the WLAN Card
To replace the WLAN card, perform the above steps in reverse order.
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WWAN Card
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the WWAN Card
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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2.
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4.
5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Disconnect the WWAN antenna cables from the card.
6.
Remove the screw that secures the WWAN card to the system board.
7.
Remove the WWAN card from the computer.
Replacing the WWAN Card
To replace the WWAN card, perform the above steps in reverse order.
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Hard Drive/Hard-Drive Brackets
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Hard Drive/Hard-Drive Brackets
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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2.
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5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the screws that secure the hard drive to the system board.
6.
Slide the hard drive towards the side of the computer to disengage the hard drive from the system board.
7.
Lift the hard drive up to remove it from the computer.
8.
Remove the hard-drive bracket screws from both sides of the hard drive.
9.
Remove the hard-drive bracket from the hard drive.
Replacing the Hard Drive/Hard-Drive Brackets
To replace the hard drive/hard-drive brackets, perform the above steps in reverse order.
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Heatsink
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Heatsink
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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2.
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5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Disconnect the speaker cable from the system board and remove it from its routing path.
6.
Disconnect the fan power cable from the system board.
7.
Loosen the captive screws on the heat sink.
8.
Lift the heat sink up to remove it from the computer.
Replacing the Heatsink
To replace the heatsink, perform the above steps in reverse order.
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DC Power Cable
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the DC Power Cable
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
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4.
5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Disconnect the DC power cable from the system board.
6.
Remove the screw that secures the DC power-cable connector to the system board.
7.
Lift up to remove the DC power cable from the computer.
Replacing the DC Power Cable
To replace the DC power cable, perform the above steps in reverse order.
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Display Assembly
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Assembly
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
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5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Disconnect the speaker cable from the system board and remove it from its routing path.
6.
Disconnect the antenna cables from the WLAN card and then remove the cables from their routing path.
7.
Disconnect the display data cable from the system board.
8.
Remove the screws that secure the display assembly.
9.
Remove the display assembly by sliding it toward the base of the computer.
Replacing the Display Assembly
To replace the display assembly, perform the above steps in reverse order.
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Display Bezel
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Bezel
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
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4.
5.
6.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the display assembly.
Using a plastic scribe, pry and remove the rubber screw-covers from the display bezel.
7.
Remove the screws that secure the display bezel to the display assembly.
8.
Starting at the bottom of the display bezel, disengage the display bezel from the display assembly, and then remove the display bezel.
Replacing the Display Bezel
To replace the display bezel, perform the above steps in reverse order.
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Display-Hinge Covers
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display-Hinge Covers
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
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7.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the display assembly.
Remove the display bezel.
Pivot the hinge cover away from the hinge and remove the hinge cover.
Replacing the Display-Hinge Covers
To replace the display-hinge covers, perform the above steps in reverse order.
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Camera
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Camera
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
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5.
6.
7.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the display assembly.
Remove the display bezel.
Disconnect the cable from the camera module.
8.
Peel the tapes that secure the camera to the display assembly.
9.
10.
Remove the screws that secure the camera to the display assembly.
Lift the camera module up to remove it from the display assembly.
Replacing the Camera
To replace the camera, perform the above steps in reverse order.
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Display Panel/Bracket
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Panel/Bracket
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
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6.
7.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the display assembly.
Remove the display bezel.
Disconnect the display touch-screen cable from the display assembly.
8.
Remove the screws that secure the display panel to the display assembly, and then flip over the display panel.
9.
10.
Remove the display data cable from the display panel.
Remove the display panel from the display assembly.
11.
Remove the screws that secure the display bracket, and then remove the display bracket from the display assembly.
Replacing the Display Panel/Bracket
To replace the display panel/bracket, perform the above steps in reverse order.
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Display Cable
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Cable
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
3.
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6.
7.
8.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the display assembly.
Remove the display bezel.
Remove the display panel.
Disconnect the camera cable from the display assembly.
9.
Remove the grounding captive screw from the display hinge.
10.
Remove the display cable from the display assembly.
Replacing the Display Cable
To replace the display cable, perform the above steps in reverse order.
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Display Hinges
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Display Hinges
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
3.
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5.
6.
7.
8.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the display assembly.
Remove the display bezel.
Remove the display panel.
Loosen the display-cable captive screw and remove the screws that secures the display hinge to the display assembly.
9.
Lift the display hinges and remove it from the display assembly.
Replacing the Display Hinges
To replace the display hinges, perform the above steps in reverse order.
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System Board/Bluetooth Module
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the System Board/Bluetooth Module
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
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8.
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10.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the hard drive.
Remove the WWAN card.
Remove the WLAN card.
Remove the display assembly.
Remove the heatsink.
Open the touchpad-cable clip and disconnect the touchpad cable from the system board. Open the button-board-cable clip and disconnect the buttonboard data cable from the system board.
11.
Remove the screws that secure the system board in place.
12.
Starting from the side where the USB ports are located, lift up the system board and remove the system board.
13.
Disconnect the Bluetooth module cable from the system board.
14.
Remove the screw that secures the Bluetooth module to the system board.
15.
Remove the Bluetooth module from the system board.
Replacing the System Board/Bluetooth Module
To replace the system board/Bluetooth module, perform the above steps in reverse order.
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Secure Digital (SD) Card
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the SD Card
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
Follow the procedures in Before Working Inside Your Computer.
Press in on the SD Card to release it.
3.
Pull and remove the SD Card from the computer.
Replacing the SD Card
To replace the SD Card, perform the above steps in reverse order.
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SIM Card
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the SIM Card
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
3.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Press in on the SIM Card to release it.
4.
Pull and remove the SIM Card from the computer.
Replacing the SIM Card
To replace the SIM Card, perform the above steps in reverse order.
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Hard Drive Accelerator Card
Dell Latitude 2120 Service Manual
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
Removing the Hard Drive Accelerator Card
NOTE: You may need to install Adobe Flash Player from Adobe.com in order to view the illustrations below.
1.
2.
3.
4.
5.
Follow the procedures in Before Working Inside Your Computer.
Remove the battery.
Remove the keyboard.
Remove the access panel.
Remove the screw that secures the hard drive accelerator card to the system board.
6.
Remove the hard drive accelerator card from the computer
7.
Remove the hard drive accelerator card metal bracket from the card.
Replacing the Hard Drive Accelerator Card
To replace the hard drive accelerator card, perform the above steps in reverse order.
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System Setup
Dell Latitude 2120 Service Manual
Overview
Entering System Setup
Boot Menu
Navigation Keystrokes
System Setup Menu Options
Overview
Use System Setup to:
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Change the system configuration information after you add, change, or remove any hardware in your computer
Set or change a user-selectable option such as the user password
Read the current amount of memory or set the type of hard drive installed
Before you use System Setup, it is recommended that you write down the System Setup screen information for future reference.
CAUTION: Unless you are an expert computer user, do not change the settings for this program. Certain changes can cause your computer to work
incorrectly.
Entering System Setup
1.
2.
Turn on (or restart) your computer.
When the DELL logo is displayed, press <F2> immediately.
Boot Menu
The Boot menu lists all the valid boot devices for your computer. Use the Boot menu to:
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Run diagnostics on your computer
Enter system setup
Change the boot sequence without changing the boot sequence permanently in the system setup
To access the Boot menu:
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2.
Turn on (or restart) your computer.
When the blue DELL logo is displayed, press <F12> immediately.
Navigation Keystrokes
Use the following keystrokes to navigate the System Setup screens:
Navigation
Action
Keystroke (s)
Expand and collapse field
<Enter>, left- or right-arrow key
Exit BIOS
<Esc>, Exit button
Select field to change
<Enter>
Change a field
Make the required change and click Apply
Cancel modification
<Esc>
Reset defaults
Load Defaults button
System Setup Menu Options
The following tables describe the menu options for the System Setup program:
General
Option
Description
This section lists the primary hardware features of your computer. There are no configurable options in this section.
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System Information
¡ BIOS Version
¡ Service Tag
¡ Asset Tag
¡ Ownership Tag
Memory Information
¡ Memory Installed
¡ Memory Available
¡ Memory Speed
¡ Memory Channel Mode
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System
Information
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Battery
Information
¡ Memory Technology
¡ DIMM A Size
Processor Information
¡ Processor Type
¡ Core Count
¡ Processor ID
¡ Current Clock Speed
Device Information
¡ Primary Hard Drive
¡ Video Controller
¡ Video BIOS Version
¡ Video Memory
¡ Panel Type
¡ Native Resolution
¡ Audio Controller
¡ Wi-Fi Device
¡ Cellular Device
¡ Bluetooth Device
¡ Integrated NIC MAC
Displays the status of the battery and the type of AC adapter connected to the computer.
Specifies the order in which the computer attempts to find an operating system.
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Boot Sequence
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Diskette drive
Internal HDD
USB Storage Device
CD/DVD/CD-RW Drive
Onboard NIC
This list specifies the order in which the BIOS searches for bootable devices. To change the boot order, select the device to be
changed in the list and click the Up/Down arrows or use the Page Up/Page Down keys to change the position of the device. You can
also exclude devices from this list using the check boxes.
Date/Time
Displays current date and time settings. Allows you to change the computer's date and time.
NOTE: System Configuration contains options and settings related to integrated system devices. Depending on your computer and installed devices, the
items listed in this section may or may not appear.
System Configuration
Option
Description
Integrated NIC
Allows you to configure the integrated network controller. The options are: Disabled, Enabled, Enabled w/PXE, and Enabled
w/RPL.
System Management
Allows you to change the system management mechanism. The options are Disabled, Alert Only, and ASF 2.0.
SATA Operation
Allows you to configure the operating mode of the internal SATA hard drive controller. The options are: Disabled, ATA, and AHCI.
Allows you to enable or disable the following devices:
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Miscellaneous
Devices
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External USB Port
Microphone
Media Card
Camera
Allows you to configure the network LED behavior.
The options are:
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Network Activity LED
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Enable ACPI OS Control — Allows the activity LED to be controlled by an ACPI operating system and ACPI driver.
Wireless LAN Indicator — The network activity LED indicates WLAN activity.
Off — Switches off the network activity LED.
NOTE: If you use Ubuntu operating system, the network activity LED can only function as a WLAN-radio on/off indicator and you must
select the option Wireless LAN Indicator. Selecting any other option disables the network activity LED.
Video
Option
Description
LCD Brightness
Allows you to set the display brightness depending up on the power source (On Battery and On AC).
Security
Option
Description
Allows you to set, change, or delete the administrator (admin) password. When set, the admin password enables several security
features including:
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Admin Password
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Restricts changes to the settings in Setup
Restricts the boot devices listed in the <F12> Boot Menu to those enabled in the "Boot Sequence" field
Prohibits changes to the owner and asset tags
Substitutes for the system and hard drive password
NOTE: You must set the admin password before you set the system or hard drive password.
NOTE: Successful password changes take effect immediately.
NOTE: Deleting the admin password automatically deletes the system password as well. System
Password
Allows you to set, change, or delete the system password. When set, your computer requests you to enter the system password every
time your computer turns on or restarts.
NOTE: Successful password changes take effect immediately.
Internal HDD
Password
This field lets you set, change, or delete the password on the system's internal hard disk drive (HDD). Successful changes take place
immediately and require a system restart. The HDD password travels with the hard drive, so the HDD is protected even when installed in
another system.
Allows you to bypass the system and internal hard drive password prompts when your computer restarts or resumes from standby.
Password
Bypass
You can set Password Bypass to: Disabled, Reboot Bypass, Resume Bypass, and Reboot & Resume Bypass.
NOTE: You cannot bypass the system or hard drive password when you turn on your computer that has been shut down.
Password
Change
Allows you to enable or disable changes to the System and hard drive passwords when the admin password is set.
Allows you to enable or disable the optional Computrace software. The options are Deactivate, Disable, and Activate.
Computrace
NOTE: The Activate and Disable options will permanently activate or disable the feature and no further changes will be allowed.
Allows you to enable or disable the Execute Disable mode of the processor.
CPU XD Support
Default setting: Enabled
Performance
Option
Description
Intel SpeedStep
Enables or disables the Intel SpeedStep feature.
Power Management
Option
Description
Wake on AC
Allows you to enable or disable the computer from turning on automatically when an AC adapter is connected.
Allows you to set the time at which the computer must turn on automatically.
Auto On Time
You can set the days on which you want the computer to turn on automatically. The settings are Disabled, Everyday, or Weekdays.
Default setting: Disabled
Allows you to enable or disable the ability of USB devices to wake the computer from Standby.
USB Wake
Support
This feature is only functional when the AC power adapter is connected. If the AC power adapter is removed during Standby, the BIOS will
remove power from all of the USB ports to conserve battery power.
Allows the computer to turn on by a special LAN signal or from Hibernate state when triggered by a special wireless LAN signal. Wake-up
from the Standby state is unaffected by this setting and must be enabled in the operating system.
Wake on LAN
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Disabled — Do not allow the system to power on when it receives a wake-up signal from the LAN or wireless LAN.
LAN Only — Allow the system to be powered on by special LAN signals.
The factory default setting is Disabled.
Allows you to enable or disable the ExpressCharge feature.
ExpressCharge
NOTE: ExpressCharge may not be available for all batteries.
Charger
Behavior
Allows you to enable or disable the battery charger. If disabled, the battery will not lose power when the system is connected to an AC
adapter but it will not charge either.
Default setting: Charger Enabled
POST Behavior
Option
Adapter
Warnings
Description
Allows you to enable or disable the BIOS warning messages when you use certain power adapters. The BIOS displays these messages if
you attempt to use a power adapter that has too little capacity for your configuration.
The factory default setting is Enable Adapter Warnings.
Allows you to select one of two methods to enable the keypad that is embedded in the internal keyboard.
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Keypad
(Embedded)
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Fn Key Only — The keypad is only enabled when you hold down the <Fn> key.
By Num Lk — The keypad is enabled when (1) the Num Lock LED is on and (2) no external keyboard is attached. Note that the
system might not notice immediately when an external keyboard is detached.
NOTE:When Setup is running, this field has no effect—Setup works in the Fn Key Only mode.
Default setting: Fn Key Only.
Allows you to enable or disable the Num Lock LED when the computer boots.
Numlock LED
Default setting: Enabled.
Defines how the BIOS handles the USB devices. USB emulation is always enabled during POST.
USB Emulation
The factory default setting is Enabled.
Allows you to use the <Scroll Lock> key on an external PS/2 keyboard the same way you use the <Fn> key on the computer's internal
keyboard.
Fn Key
Emulation
NOTE: USB keyboards cannot emulate the <Fn> key if you are running an ACPI operating system such as Microsoft Windows XP. USB
keyboards will only emulate the <Fn> key in non-ACPI mode (e.g., when you are running a DOS).
Default setting: Enabled.
Allows you to enable or disable the Fast Boot feature. The following options are available:
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Fast Boot
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Minimal — Boot quickly unless the BIOS has been updated, memory changed, or the previous POST did not complete.
Thorough — Do not skip any steps in the boot process.
Auto — Allow the operating system to control this setting (this works only when the operating system supports Simple Boot Flag).
Default setting: Minimal
Wireless
Option
Description
Wireless Devices
Allows you to enable or disable the following internal wireless devices: WWAN, WLAN, and Bluetooth.
Maintenance
Option
Description
Displays your computer's Service Tag. If for some reason the Service Tag was not already set, you can use this field to set the Service Tag.
Service
Tag
Asset Tag
If a Service Tag has not been set for this computer, the computer will automatically bring up this screen when you enter the System Setup. You
will be prompted to enter the Service Tag.
Allows you to create a system Asset Tag. The field can only be updated if the Asset Tag is not already set.
System Logs
Option
Description
BIOS Events
Allows you to view and clear BIOS POST events. It includes the date and time of the event as well as the LED code.
DellDiag
Events
Allows you to view the diagnostic results from Dell Diagnostics and PSA. It includes the time and date, the diagnostic and version which was
run and the resulting code.
Thermal
Events
Allows you to view and clear thermal events. It includes the date and time as well as the name of the event.
Power Events
Allows you to view and clear power events. It includes the date and time of the event as well as the power state and reason.
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Diagnostics
Dell Latitude 2120 Service Manual
Device Status Lights
Battery Status Lights
Battery Charge and Health
Keyboard Status Lights
LED Error Codes
Device Status Lights
Turns on when you turn on the computer and blinks when the computer is in a power management mode.
Turns on when the computer reads or writes data.
Turns on steadily or blinks to indicate battery charge status.
Turns on when wireless networking is enabled.
Battery Status Lights
If the computer is connected to an electrical outlet, the battery light operates as follows:
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Alternately blinking amber light and blue light — An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop.
Alternately blinking amber light with steady blue light — Temporary battery failure with AC adapter present.
Constantly blinking amber light — Fatal battery failure with AC adapter present.
Light off — Battery in full charge mode with AC adapter present.
Blue light on — Battery in charge mode with AC adapter present.
Battery Charge and Health
To check the battery charge, press and release the status button on the battery charge gauge to illuminate the charge-level lights. Each light represents
approximately 20 percent of the total battery charge. For example, if four lights are on, the battery has 80 percent of its charge remaining. If no lights appear,
the battery has no charge.
To check battery health using the charge gauge, press and hold the status button on the battery charge gauge for at least three seconds. If no lights appear,
the battery is in good condition and more than 80 percent of its original charge capacity remains. Each light represents incremental degradation. If five lights
appear, less than 60 percent of the charge capacity remains, and you should consider replacing the battery.
Keyboard Status Lights
The green lights located above the keyboard indicate the following:
Turns on when the numeric keypad is enabled.
Turns on when the Caps Lock function is enabled.
Turns on when the Scroll Lock function is enabled.
LED Error Codes
The following table shows the possible LED codes that may display in a no-Power On Self Test (POST) situation.
Appearance
Description
ON-FLASH-FLASH
Next Step
1.
2.
No SODIMMs are installed
4.
Install supported memory modules.
If memory is already present, reseat the module(s) one at a
time in each slot.
Try known good memory from another computer or replace the
memory.
Replace the system board.
1.
Replace the system board.
3.
FLASH-ON-ON
System board error
FLASH-ON-FLASH
LCD panel error
OFF-FLASH-OFF
1.
2.
3.
Reseat the LCD cable.
Replace the LCD panel.
Replace the video card/system board.
1.
2.
Install compatible memory modules.
If two modules are installed, remove one and test. Try the
other module in the same slot and test. Test the other slot
with both modules.
Replace the memory.
Replace the system board.
Memory compatibility error
3.
4.
ON-FLASH-ON
1.
2.
Memory is detected but has
errors
3.
4.
Reseat the memory.
If two modules are installed, remove one and test. Try the
other module in the same slot and test. Test the other slot
with both modules.
Replace the memory.
Replace the system board.
1.
Replace the system board.
1.
2.
3.
Reseat the hard drive.
Replace the hard drive.
Replace the system board.
1.
Replace the system board.
FLASH-FLASH-FLASH
System board error
OFF-ON-OFF
Storage device error
FLASH-FLASH-ON
Video card error
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Adding and Replacing Parts
Dell Latitude 2120 Service Manual
Secure Digital Card
Battery
SIM Card
Keyboard
Access Panel
Memory
Coin-Cell Battery
WLAN Card
WWAN Card
Hard Drive Accelerator Card
Heatsink
Hard Drive/Hard-Drive Bracket
DC Power Cable
Display Assembly
Display-Hinge Covers
Display Bezel
Display/Display Brackets
Camera
Display Hinge
Display Cable
System Board/Bluetooth Module
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Specifications
System Information
Processor
Memory
Video
Audio
Communications
Ports and Connectors
Drives
Display
Keyboard
Touchpad
Battery
AC Adapter
Environmental
Physical
NOTE: Offerings may vary by region. For more information regarding the configuration of your computer, click Start® Help and Support and select the
option to view information about your computer.
System Information Chipset
Intel NM10 Express Chipset
DRAM bus width
64 bits
Flash EPROM
2 MB
PCI-e bus
x1 PCI Express, 4 ports
Processor Types
Intel Atom
L1 cache
32 KB per instruction, 24 KB write-back data cache
L2 cache
512 KB
Memory Type
DDR2 SDRAM
Speed
667 MHz
Connectors
one SODIMM slot
Module capacities
1 GB, 2 GB
Minimum memory
1 GB
Maximum memory
2 GB
Video
Type
Intel UMA graphics (integrated on the processor)
Controller
Intel Graphics Media Accelerator
Output
15-pin VGA connector
Audio Type
two-channel integrated audio
Controller
Realtek ALC269
Speakers
two
Internal speaker amplifier
2 W per channel
Volume controls
media control buttons, program menus
Communications Network adapter
Gigabit Ethernet
Wireless
wireless local area network (WLAN)
wireless wide area network (WWAN)
worldwide Interoprability for microwave access
(WiMAX)
Bluetooth
Ports and Connectors Audio
microphone connector, stereo headphone/speakers connector
Video
15-pin VGA connector
Network adapter
RJ-45 connector
USB
three USB 2.0-compliant connectors
Memory card reader
3-in-1 memory-card reader
Drives
Hard drive
2.5" SATA 2 HDD
Display Type
WSVGA (1024 x 600 pixels) and HD (1366 x 768
pixels), high definition, anti glare (AG), white lightemitting diode (WLED)
Size
10.1 inches
Active area (X/Y)
WSVGA
222.72 mm x 125.28 mm (8.76 inches x 4.93 inches)
HD
222.73 mm x 125.22 mm (8.76 inches x 4.93 inches)
Dimensions
Height
235.00 mm (9.2 inches)
Width
143.00 mm (5.6 inches)
Diagonal
256.00 mm (10.1 inches)
Maximum resolution
1366 x 768 at 262 K colors
Maximum brightness
250 nits
Operating angle
WSVGA
Horizontal—40°/40°, Vertical—15°/30°
HD
Horizontal—40°/40°, Vertical—10°/30°
Refresh rate
60 Hz
Viewing angles
Horizontal
40°/40°
Vertical
13°/35°
Pixel pitch
0.2148 mm
Horizontal
0.21750 mm x 0.20880 mm
Vertical
0.16305 mm x 0.16305 mm
Keyboard Number of keys
United States: 83 keys
United Kingdom: 84 keys
Brazil: 85 keys
Japan: 87 keys
Layout
QWERTY/AZERTY/Kanji
Touchpad Active area
X-axis
60.40 mm (2.37 inches)
Y-axis
34.00 mm (1.34 inches)
Battery Type
3-cell "smart" lithium ion (28 WHr)
6-cell "smart" lithium ion (56 WHr)
Charge time with computer off
approximately 80% charge on the battery is restored
in 1 hour (on a fully discharged battery)
Operating time
battery operating time varies depending on operating
conditions and can significantly reduce under certain
power-intensive conditions.
Life span
approximately 300 charge/discharge cycles
Depth
3-cell
40.50 mm (1.59 inches)
6-cell
48.13 mm (1.89 inches)
Height
3-cell
23.24 mm (0.92 inches)
6-cell
42.46 mm (1.67 inches)
3-cell
204.00 mm (8.03 inches)
6-cell
204.00 mm (8.03 inches)
Width
Weight
3-cell
185 g – 190 g (0.40 lb – 0.41 lb)
6-cell
340 g – 350 g (0.74 lb – 0.77 lb)
Voltage
11.1 VDC (6-cell and 3-cell)
Temperature range
Operating
0 °C to 35 °C (32 °F to 95 °F)
Storage
Coin-cell battery
–40 °C to ~65 °C (–40 °F to ~149 °F)
3 V CR2032 lithium coin cell
AC Adapter Input voltage
100 VAC–240 VAC
Input current (maximum)
1.5 A
Input frequency
50 Hz–60 Hz
Output power
65 W
Output current
4.34 A (maximum at 4-second pulse)
3.34 A (continuous)
Depth
66.00 mm (2.59 inches)
Height
16.00 mm (0.63 inches)
Width
127.00 mm (4.99 inches)
Temperature range
Operating
0 °C to 35 °C (32 °F to 95 °F)
Storage
–40 °C to 65 °C (–40 °F to 149 °F)
Physical Height
without touchscreen
22.50 mm – 39.90 mm
(0.89 inch – 1.57 inches)
with touchscreen
24.10 mm – 41.50 mm
(0.95 inch – 1.63 inches)
Width
265.00 mm (10.43 inches)
Depth
187.00 mm (7.36 inches)
Weight
(3-cell battery without touchscreen)
1.30 kg (2.86 lb)
(6-cell battery without touchscreen)
1.50 kg (3.30 lb)
Environmental Temperature range
Operating
0 °C to 35 °C (32 °F to 95 °F)
Non-operating
–40 °C to ~65 °C (–40 °F to ~149 °F)
Relative humidity (maximum)
Operating
10 % to 90 % (noncondensing)
Non-operating
20 % to 95 % (noncondensing)
Altitude (maximum)
Operating
–15.20 m to 3048 m (–50 ft to 10,000 ft)
Storage
–15.20 m to 10,668 m (–50 ft to 35,000 ft)
Maximum vibration
Operating
0.66 Grms (2 Hz–600 Hz)
Non-operating
1.30 Grms (2 Hz–600 Hz)
NOTE: Vibration is measured using a random-vibration spectrum that simulates user environment.
Maximum shock
Operating
110 G (2 ms)
Non-operating
160 G (2 ms)
NOTE: Shock is measured with hard drive in head-parked position and a 2 ms half-sine pulse.
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Working on Your Computer
Dell™ Latitude™ 2120 Service Manual
Before Working Inside Your Computer
Recommended Tools
Turning Off Your Computer
After Working Inside Your Computer
Before Working Inside Your Computer
Use the following safety guidelines to help protect your computer from potential damage and to help to ensure your personal safety. Unless otherwise noted,
each procedure included in this document assumes that the following conditions exist:
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You have read the safety information that shipped with your computer.
A component can be replaced or--if purchased separately--installed by performing the removal procedure in reverse order.
WARNING: Before working inside your computer, read the safety information that shipped with your computer. For additional safety best
practices information, see the Regulatory Compliance Homepage at www.dell.com/regulatory_compliance.
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as
authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not
authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.
CAUTION: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal
surface, such as a connector on the back of the computer.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal
mounting bracket. Hold a component such as a processor by its edges, not by its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have connectors with locking
tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep
them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented
and aligned.
NOTE: The color of your computer and certain components may appear differently than shown in this document.
To avoid damaging your computer, perform the following steps before you begin working inside the computer:
1.
2.
3.
4.
Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
Turn off your computer (see Turning Off Your Computer).
Remove any installed ExpressCards or Smart Cards from the appropriate slots.
If the computer is connected to a docking device (docked) such as the optional Media Base or Battery Slice, undock it.
CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device.
5.
6.
7.
Disconnect all network cables from the computer.
Disconnect your computer and all attached devices from their electrical outlets.
Close the display and turn the computer upside-down on a flat work surface.
CAUTION: To avoid damaging the system board, you must remove the main battery before you service the computer.
8.
9.
10.
11.
Remove the main battery.
Turn the computer top-side up.
Open the display.
Press the power button to ground the system board.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the display.
CAUTION: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back
of the computer. While you work, periodically touch an unpainted metal surface to dissipate static electricity, which could harm internal
components.
12.
Remove the hard drive.
Recommended Tools
The procedures in this document may require the following tools:
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Small flat-blade screwdriver
#0 Phillips screwdriver
#1 Phillips screwdriver
Small plastic scribe
Flash BIOS update program CD
Turning Off Your Computer
CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.
1.
Shut down the operating system:
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In Windows® 7:
Click Start
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Click Start
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, then click Shut Down.
In Windows Vista®:
, then click the arrow in the lower-right corner of the Start menu as shown below, and then click Shut Down.
In Windows® XP:
Click Start →Turn Off Computer →Turn Off.
The computer turns off after the operating system shutdown process is complete.
2.
Ensure that the computer and all attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your operating system, press and hold the power button for about four seconds to turn them off.
After Working Inside Your Computer
After you complete any replacement procedure, ensure you connect any external devices, cards, and cables before turning on your computer.
CAUTION: To avoid damage to the computer, use only the battery designed for this particular Dell computer. Do not use batteries designed for
other Dell computers.
1.
2.
Connect any external devices, such as a port replicator, battery slice, or media base, and replace any cards, such as an ExpressCard.
Connect any telephone or network cables to your computer.
CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer.
3.
4.
5.
6.
Replace the hard drive.
Replace the battery.
Connect your computer and all attached devices to their electrical outlets.
Turn on your computer.
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