DELL Latitude D400 Service Manual

Please check out our eBay auctions for more great deals on Factory Service Manuals:

Dell Latitude D400 Service Manual

Dell™ Latitude™ D400 Service Manual

Before You Begin

Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identification

Using the Dell Diagnostics

When to Use the Dell Diagnostics Features of the Dell Diagnostics

Starting the Dell Diagnostics System Components Keyboard

Removing the Keyboard

Installing the Keyboard Memory

Installing a Memory Module Under the Memory

Module/Modem Cover

Installing a Memory Module Under the Keyboard Mini PCI Card Modem Hard Drive

Removing the Hard Drive

Installing the Hard Drive

Removing the Interposer

Replacing the Interposer Docking Doors

Removing the Docking Doors

Installing the Docking Doors Bluetooth™ Display

Removing the Display Assembly

Replacing the Display Latch Palm Rest Cooling Fan Touch Pad System Board

Removing the System Board

Replacing the System Board Reserve Battery

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/index.htm (1 of 2)6/21/2004 1:55:59 AM

Dell Latitude D400 Service Manual

Flashing the BIOS Speakers Battery Latch Pin Assignments for I/O Connectors

USB Connector

Video Connector

Serial Connector

Dell D/Bay Connector Mini Recommended Spares List

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of your

computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you

how to avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or

death.

Reproduction 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.; Microsoft and Windows are registered trademarks of Microsoft Corporation; Bluetooth is a trademark owned by Bluetooth SIG, Inc. and is used by Dell Inc. under license.

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.

Model PPT

October 2003 Rev. A02

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/index.htm (2 of 2)6/21/2004 1:55:59 AM

Before You Begin: Dell Latitude D400 Service Manual

Back to Contents Page

Before You Begin

Dell™ Latitude™ D400 Service Manual

Preparing to Work Inside the Computer Recommended Tools Computer Orientation Screw Identification

Preparing to Work Inside the Computer

CAUTION: Only a certified service technician should perform repairs on your

computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions in the System Information Guide that came with the computer.

CAUTION: To prevent static damage to components inside your computer, discharge

static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface.

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 microprocessor by its edges, not by its pins.

NOTICE: To avoid damaging the computer, perform the following steps before you begin

working inside the computer.

1. Ensure that the work surface is flat and clean to prevent scratching the computer cover.

2. Save any work in progress and exit all open programs.

3. Turn off the computer and all attached devices.

NOTE: Ensure that the computer is off and not in a power management mode. If you cannot

shut down the computer using the computer operating system, press and hold the power button for 4 seconds.

4. If the computer is connected to a docking device (docked), undock it.

5. Disconnect the computer from the electrical outlet.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/begin.htm (1 of 6)6/21/2004 1:56:01 AM

Before You Begin: Dell Latitude D400 Service Manual

6. To avoid possible damage to the system board, wait 10 to 20 seconds and then disconnect any attached devices.

7. Disconnect all other external cables from the computer.

8. Remove any installed PC Cards from the PC Card slot.

9. Close the display and turn the computer upside down on a flat work surface.

NOTICE: To avoid damaging the system board, you must remove the main battery before you

service the computer.

10. Slide and hold the battery-bay latch release on the bottom of the computer, and then remove the battery from the bay.

Recommended Tools

The procedures in this manual require the following tools:

● Phillips screwdriver

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/begin.htm (2 of 6)6/21/2004 1:56:01 AM

Before You Begin: Dell Latitude D400 Service Manual

● Flat-blade screwdriver

● Small plastic scribe

● Flash BIOS update program floppy disk or CD

Computer Orientation

back

right

front

left

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/begin.htm (3 of 6)6/21/2004 1:56:01 AM

Before You Begin: Dell Latitude D400 Service Manual

Screw Identification

When you are removing and replacing components, photocopy "Screw Identification" as a tool to lay out and keep track of the screws. The screw identification chart provides the number of screws and

their sizes.

keyboard

(two each)

1428U

modem

(one each)

1428U

hard drive

(four each)

2864D

display removal

(six each)

4911U

display bezel

(six each)

7166P

display latch

(two each)

5H953

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/begin.htm (4 of 6)6/21/2004 1:56:01 AM

Before You Begin: Dell Latitude D400 Service Manual

palm rest

(thirteen each)

4911U

(two each)

5H953

fan

(three each)

1428U

system board

(six each)

1428U

(one each, if a BIOS card is present)

1428U

speakers

(two each)

4911U

Back to Contents Page

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/begin.htm (5 of 6)6/21/2004 1:56:01 AM

Before You Begin: Dell Latitude D400 Service Manual

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...ok/Latitude/D400/D400_SERVICE_MANUAL/begin.htm (6 of 6)6/21/2004 1:56:01 AM

Using the Dell Diagnostics:

Back to Contents Page

Using the Dell Diagnostics

When to Use the Dell Diagnostics Features of the Dell Diagnostics Starting the Dell Diagnostics

When to Use the Dell Diagnostics

Whenever a major component or device in your computer does not function properly, you may have a component failure. If you are experiencing a problem with your Dell™ computer, perform the checks in the "Solving Problems" section in the User's Guide and run the Dell Diagnostics before you call Dell for technical assistance. Running the Dell Diagnostics may help you to resolve the problem yourself quickly without having to contact Dell for assistance.

If you are experienced with computers and know what component(s) you need to test, select the appropriate diagnostic test group(s) or subtest(s). If you are unsure about how to begin diagnosing a problem, see "Starting the Dell Diagnostics."

Features of the Dell Diagnostics

The Dell Diagnostics helps you to check your computer hardware without any additional equipment and without destroying any data. By using the diagnostics, you can have confidence in the operation of your computer. If you find a problem that you cannot solve by yourself, the diagnostic tests can provide you with important information you need when talking to Dell's service and support personnel.

NOTICE: Use the Dell Diagnostics to test only your Dell computer. Using this program with

other computers may cause incorrect computer responses or result in error messages.

The diagnostic test groups or subtests also have the following features:

● Options that let you perform express, extended, or custom tests on one or all devices

● An option that allows you to select tests based on a symptom of the problem you are having

● An option that allows you to choose the number of times a test group or subtest is repeated

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...0ok/Latitude/D400/D400_SERVICE_MANUAL/diag.htm (1 of 4)6/21/2004 1:56:02 AM

Using the Dell Diagnostics:

● The ability to display test results

● Options to temporarily suspend testing if an error is detected, or to terminate testing

● Extensive online Help that describes the tests and devices

● Status messages that inform you whether test groups or subtests were completed successfully

● Error messages that appear if any problems are detected

Starting the Dell Diagnostics

The Dell Diagnostics is located on a hidden Diagnostic utility partition on your hard drive.

NOTE: If your computer cannot display a screen image, contact Dell. See the User's Guide for

contact information.

1. Shut down the computer.

2. If the computer is connected to a docking device (docked), undock it. See the documentation that came with your docking device for instructions.

3. Connect the computer to an electrical outlet.

NOTE: If you do not see anything on your display, hold down the mute button and press the

power button (instead of <F12>) to begin the Dell Diagnostics. You do not need to highlight Diagnostics and press <Enter>. The computer automatically runs the Pre-boot System Assessment.

4. Turn on the computer. When the DELL™ logo appears, press <F12> immediately. If you wait too long and the Microsoft® Windows® logo appears, continue to wait until you see the Windows desktop. Then shut down your computer and try again.

5. When the boot device list appears, highlight Diagnostics and press <Enter>.

The computer begins to run the Pre-boot System Assessment, a series of embedded diagnostics that perform initial testing on your system board, keyboard, hard drive, and display.

● During the assessment, answer any questions that appear.

● If a component failure is detected, the computer stops and beeps. To stop the

assessment and reboot to the operating system, press <N>; to continue to the next test, press <Y>; to retest the component that failed, press <R>.

● If failures are detected during the Pre-boot System Assessment, write down the error

code(s) and contact Dell before continuing on to the Dell Diagnostics. See the User's

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...0ok/Latitude/D400/D400_SERVICE_MANUAL/diag.htm (2 of 4)6/21/2004 1:56:02 AM

Using the Dell Diagnostics:

Guide for contact information.

● If you receive a message stating that no Diagnostics utility partition has been found,

follow the instructions on the screen to run the Dell Diagnostics from your Drivers and Utilities CD.

If the Pre-boot System Assessment completes successfully, you receive the message Booting Dell Diagnostic Utility Partition. Press any key to continue.

6. Press any key to start the Dell Diagnostics from the Diagnostics utility partition on your hard drive.

7. After the Dell Diagnostics loads and the Main Menu screen appears, click the button for the option you want.

NOTE: The Service Tag for your computer is located in the title bar of each

screen.

Option Function

Express Test Performs a quick test of devices. The test typically takes 10 to 20 minutes and

requires no interaction on your part. Run Express Test first to increase the possibility of tracing the problem quickly.

Extended Test Performs a thorough check of devices. The test typically takes 1 hour or more and

requires you to answer questions periodically. Custom Test Tests a specific device. You can customize the tests to be run. Symptom Tree Allows you to select tests based on a symptom of the problem you are experiencing.

The option lists the most common symptoms.

8. If a problem is encountered during a test, a message appears, displaying the error code and a description of the problem. Write down the error code and problem description and follow the instructions on the screen. If you cannot resolve the error condition, contact Dell. See the User's Guide for contact information.

9. If you run a test from the Custom Test or Symptom Tree option, click the applicable tab described in the following table for more information.

Tab Function

Results Displays the results of the test and any error conditions encountered. Errors Displays error conditions encountered, error codes, and problem description. Help Describes the test and may indicate requirements for running the test.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...0ok/Latitude/D400/D400_SERVICE_MANUAL/diag.htm (3 of 4)6/21/2004 1:56:02 AM

Using the Dell Diagnostics:

Configuration Displays your hardware configuration for the selected device.

The Dell Diagnostics obtains your configuration information for all devices from the system setup program, memory, and various internal tests and displays the information in the device list in the left pane of the screen (see the User's Guide for information on the system setup program). The device list may not display the names of all the components installed on your computer or all devices attached to your computer.

Parameters Allows you to customize the test by changing the test settings.

10. When you have finished running a test, close the screen to return to the Main Menu screen. To exit the Dell Diagnostics and reboot the computer, close the Main Menu screen.

Back to Contents Page

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...0ok/Latitude/D400/D400_SERVICE_MANUAL/diag.htm (4 of 4)6/21/2004 1:56:02 AM

System Components:

Back to Contents Page

System Components

NOTICE: Only a certified service technician should perform repairs on your computer. Damage

due to servicing that is not authorized by Dell is not covered by your warranty.

NOTICE: Unless otherwise noted, each procedure in this document assumes that a part can be

replaced by performing the removal procedure in reverse order.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...k/Latitude/D400/D400_SERVICE_MANUAL/system.htm (1 of 2)6/21/2004 1:56:03 AM

System Components:

display P1291

smart card reader 0X740

keyboard P1290

hard drive See Mini RSL

palm rest 4U782

memory module cover P0777

speaker 4U782

battery See Mini RSL

DIMM1 cover 2X386

computer base D2389

metal shield 2X370

reserve battery 3U490

Hard drive controller card 2X372

display connector 2X241

system board See Mini RSL

center control cover 5U447

fan 6U568

Back to Contents Page

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...k/Latitude/D400/D400_SERVICE_MANUAL/system.htm (2 of 2)6/21/2004 1:56:03 AM

Keyboard:

Back to Contents Page

Keyboard

Removing the Keyboard Installing the Keyboard

Removing the Keyboard

CAUTION: Before performing the following procedures, read the safety instructions

in your System Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or

by periodically touching an unpainted metal surface (such as the back panel) on the computer.

1. Follow the instructions in "Preparing to Work Inside the Computer" to remove the battery and prepare the computer for work.

2. Open the display approximately 180 degrees.

3. Use a plastic scribe or, if a plastic scribe is not available, carefully use a small flat-blade screwdriver to lift the notched right edge of the center control cover, and pry the cover loose from the bottom case.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/D400/D400_SERVICE_MANUAL/keyboard.htm (1 of 5)6/21/2004 1:56:04 AM

Keyboard:

center control cover 5U447

4. Remove the two M2 x 5-mm screws from the top of the keyboard.

5. Use the pull-tab to pull the keyboard up and out (toward the display) of the bottom case.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/D400/D400_SERVICE_MANUAL/keyboard.htm (2 of 5)6/21/2004 1:56:04 AM

Keyboard:

keyboard P1290

keyboard pull-tab

M2 x 5-mm screws (2) 1428U

securing tabs (5)

6. Rest the keyboard face down on the palm rest.

7. Pull straight up on the pull-tab that is attached to the keyboard connector to disconnect the connector from the interface connector on the system board.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/D400/D400_SERVICE_MANUAL/keyboard.htm (3 of 5)6/21/2004 1:56:04 AM

Keyboard:

pull-tab on keyboard connector

keyboard connector

Installing the Keyboard

1. Connect the keyboard connector to the interface connector on the system board.

2. Insert the five securing tabs on the keyboard into their respective slots in the palm rest.

3. Replace the two screws at the top of the keyboard.

4. Replace the center control cover and snap it down starting on the left side and working to the right side so that it is flush with the palm rest.

Back to Contents Page

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/D400/D400_SERVICE_MANUAL/keyboard.htm (4 of 5)6/21/2004 1:56:04 AM

Keyboard:

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/LA...Latitude/D400/D400_SERVICE_MANUAL/keyboard.htm (5 of 5)6/21/2004 1:56:04 AM

Memory:

Back to Contents Page

Memory

Installing a Memory Module Under the Memory Module/Modem Cover Installing a Memory Module Under the Keyboard

CAUTION: Before performing the following procedures, read the safety instructions

in your System Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or

by periodically touching an unpainted metal surface (such as the back panel) on the computer.

1. Follow the instructions in "Preparing to Work Inside the Computer" to remove the battery and prepare the computer for work.

2. Continue to the appropriate section:

● "Installing a Memory Module Under the Memory Module/Modem Cover"

● "Installing a Memory Module Under the Keyboard"

Installing a Memory Module Under the Memory Module/Modem Cover

1. Turn the computer over, loosen the captive screws on the memory module/modem cover, and then remove the cover.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/L.../Latitude/D400/D400_SERVICE_MANUAL/memory.htm (1 of 6)6/21/2004 1:56:06 AM

Memory:

1 captive screws (2) 2 memory module/modem cover P0777

NOTICE: To prevent damage to the memory module connector, do not use tools to spread the

memory-module securing clips.

2. If you are replacing a memory module, remove the existing module:

a. Use your fingertips to carefully spread apart the securing clips on each end of the

memory module connector until the module pops up.

b. Remove the module from the connector.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/L.../Latitude/D400/D400_SERVICE_MANUAL/memory.htm (2 of 6)6/21/2004 1:56:06 AM

Memory:

1 memory module See Mini RSL 2 securing clips (2)

3. Ground yourself and install the new memory module:

a. Align the notch in the module edge connector with the tab in the connector slot. b. Slide the module firmly into the slot at a 45-degree angle, and rotate the module down

until it clicks into place. If you do not feel the click, remove the module and reinstall it.

NOTE: If the memory module is not installed properly, the computer may not boot properly. No

error message indicates this failure.

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/L.../Latitude/D400/D400_SERVICE_MANUAL/memory.htm (3 of 6)6/21/2004 1:56:06 AM

Memory:

4. Replace the cover.

NOTICE: If the cover is difficult to close, remove the module and reinstall it. Forcing the cover

to close may damage your computer.

5. Insert the battery into the battery bay, or connect the AC adapter to your computer and an electrical outlet.

6. Turn on the computer.

As the computer boots, it detects the additional memory and automatically updates the system configuration information.

To confirm the amount of memory installed in the computer:

● In the Microsoft® Windows® XP operating system, click the Start button, click Help and

Support, and then click Computer Information.

● In Windows 2000, right-click the My Computer icon on your desktop, and then click the

General tab.

Installing a Memory Module Under the Keyboard

file:///I|/SERVICE%20MANUALS/DELL%20MANUALS/L.../Latitude/D400/D400_SERVICE_MANUAL/memory.htm (4 of 6)6/21/2004 1:56:06 AM

+ 54 hidden pages

DELL Latitude D400 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual