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
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.
Recommended Tools The procedures in this manual require the following tools: l Phillips screwdriver l Flat-blade screwdriver l Small plastic scribe l Flash BIOS update program floppy disk or CD Computer Orientation 1 back 2 right 3 front 4 left 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.
1428U 2864D 1428U display removal display bezel display latch (six each) (six each) (two each) 4911U 7166P 5H953 palm rest fan system board (thirteen each) (three each) (six each) 4911U 1428U 1428U (one each, if a BIOS card is present) (two each) 1428U 5H953 speakers (two each) 4911U Back to Contents Page
Back to Contents Page Flashing the BIOS 1. Ensure that the AC adapter is plugged in and that the main battery is installed properly. NOTE: If you use a BIOS update program CD to flash the BIOS, set up the computer to boot from a CD before inserting the CD. 2. Insert the BIOS update program floppy disk or CD, and turn on the computer. Follow the instructions that appear on the screen. The computer continues to boot and updates the new BIOS.
Back to Contents Page Bluetooth™ 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.
1 Bluetooth connector 2 Bluetooth module (front) 2U381 4. Ensure that the front of the Bluetooth module (silver) is facing outward, and connect the cable to the module. 5. Insert the module into the slot. 6. Replace the cover and tighten the captive screw.
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.
4. Turn on the computer. When the DELL™ logo appears, press 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 . 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.
Back to Contents Page Display Removing the Display Assembly Replacing the Display Latch Removing the Display Assembly 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.
To replace the display latch, you must remove the whole bezel. 1. Follow the instructions in "Preparing to Work Inside the Computer." 2. Remove the hard drive. 3. Remove the keyboard. 4. Open the display 180 degrees, and remove the two rubber screw covers, four rubber screw bumpers, and the six M2.5 x 4-mm screws that secure the bezel. 1 rubber screw bumpers 6U549 2 bezel 3 rubber screw covers 2U940 4 M2.5 x 4-mm screws 7116P 5.
Back to Contents Page Docking Doors Removing the Docking Doors Installing the Docking Doors Removing the Docking Doors 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.
1 docking doors with spring 8X516 2 longer post Back to Contents Page
Back to Contents Page Cooling Fan 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.
Back to Contents Page Hard Drive Removing the Hard Drive Installing the Hard Drive Removing the Interposer Replacing the Interposer Removing the Hard Drive CAUTION: If you remove the hard drive from the computer when the drive is warm, do not touch the metal housing of the hard drive. CAUTION: Before performing the following procedures, read the safety instructions in your System Information Guide.
1. Remove the new drive from its packaging. Save the original packaging for storing or shipping the hard drive. 2. Slide the hard drive into the bay until it is fully seated. 3. Replace and tighten the two M3 x 3-mm screws. 4. Use the Operating System CD to install the operating system for your computer. 5. Use the Drivers and Utilities CD to install the drivers and utilities for your computer. Removing the Interposer 1.
Replacing the Interposer NOTICE: Use firm and even pressure to slide the drive into place. If you use excessive force, you may damage the connector. 1. Attach the hard drive carrier to the new hard drive, and replace the two M3 x 3-mm screws. 2. Carefully attach the interposer from the old hard drive by pushing it straight onto the hard drive. Ensure that the pins are oriented correctly. When the interposer is attached correctly, four extra pins are on one side. 1 interposer 8267R 3.
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.
1 keyboard P1290 2 keyboard pull-tab 3 M2 x 5-mm screws (2) 1428U 4 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. 1 pull-tab on keyboard connector 2 keyboard connector Installing the Keyboard 1. Connect the keyboard connector to the interface connector on the system board. 2.
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Back to Contents Page Battery Latch 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.
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.
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.
Installing a Memory Module Under the Keyboard 1. Remove the keyboard. 2. Loosen the two captive screws in the cover labeled "DIMM1." 1 captive screws (2) 2 DIMM1 cover 2X386 3 memory module See Mini RSL 4 securing clips (2) 5 securing tabs (3) NOTICE: To prevent damage to the memory module connector, do not use tools to spread the memory-module securing clips. 3. 4. If you are replacing a memory module, remove the existing module: a.
l In Windows XP, click the Start button, click Help and Support, and then click Computer Information. l In Windows 2000, right-click the My Computer icon on your desktop, and then click the General tab.
Back to Contents Page Mini PCI Card 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. Remove the keyboard. 3.
1 securing tabs (2) 2 Mini PCI card connector NOTICE: To avoid damaging the Mini PCI card, never place cables on top of or under the card. NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card. NOTICE: Handle the antenna cables with care because they are very fragile. NOTE: If a Mini PCI card was not already installed, remove the foam that secures the antenna cables before you install the card. 4.
Back to Contents Page Mini Recommended Spares List Dell™ Latitude™ D400 Service Manual Accessories P1516 D-Module external media bay housing with cable Bluetooth™ 2U381 Bluetooth module Bottom Base Parts D2389 computer base (bottom plastics) 2X386 DIMM1 cover 2X370 EMI shield, D400 P0777 memory door with captive screws 4U465 rubber foot (3) 0X737 Bluetooth module cover 8X516 docking doors or docking doors with spring P0777 memory module cover Bas
7M020 1 G DIMM 3Y180 128 MB DIMM 3Y182 256 MB DIMM 0K963 512 MB DIMM Mini PCI Cards 9Y200 Intel Pro 2100, 802.11b 3X548 TM1400, 802.11a\b J0846 TM1300, 802.11b\g Modem 9X163 Modem Daughter Card Power Source 5U092 AC power brick only, 65 W 9T215 AC power brick only, 90 W (must be used with DDock and D-Port) F2952 duck-head power supply plug (direct to wall) F2951 power cord, US, 0.9 m (3 ft) K2596 power cord, US, 1.
Back to Contents Page Modem 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.
Back to Contents Page Palm Rest 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. Remove the hard drive. 3.
1 M2.5 x 6-mm screws (4) 4911U 8. Disconnect the speaker connector, and remove the speaker cable. 1 ZIF connector 2 speaker connector 9. 10. Pull up on the palm rest connector tab, and disconnect the ZIF connector from the system board. Disengage the four battery bay tabs.
11. Lift the palm rest away.
Back to Contents Page Pin Assignments for I/O Connectors USB Connector Video Connector Serial Connector Dell D/Bay Connector USB Connector Pin Signal 1 USB5V+ 2 USBP– 3 USBP+ 4 GND Video Connector Pin Signal Pin Signal 1 CRT_R 9 5V+ 2 CRT_G 10 GND 3 CRT_B 11 MONITOR_DETECT– 4 NC 12 DDC_DATA 5 GND 13 CRT_HS 6 GND 14 CRT_VS 7 GND 15 DDC_CLK 8 GND Serial Connector
Pin Signal Pin Signal 1 DCD 6 DSR 2 RXDA 7 RTS 3 TXDA 8 CTS 4 DTR 9 RI 5 GND Dell D/Bay Connector Pin Signal Pin Signal 1 USB_VCC 8 SMB_CLK 2 USB_D- 9 GND 3 USB_D+ 10 SHIELD GND 4 USB_GND 11 SHIELD GND 5 PWR_SRC 12 SHIELD GND 6 SMB_DAT 13 SHIELD GND 7 MODPRES# 14 SHIELD GND Back to Contents Page
Back to Contents Page Reserve Battery 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 main battery and prepare the computer for work. 2.
Back to Contents Page Speakers 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. Follow the instructions in the palm rest section. The replacement palm rest contains the replacement speakers.
Back to Contents Page System Board Removing the System Board Replacing the System Board Removing the System Board The system board's BIOS chip contains the Service Tag, which is also visible on a bar code label on the bottom of the computer. The replacement kit for the system board may include a CD that provides a utility for transferring the Service Tag to the replacement system board.
1 smart card cable 9. Unroute and disconnect the Bluetooth™ cable from the system board. 1 Bluetooth cable 10. Remove the four M2 x 5-mm screws from the metal shield, and remove the metal shield. 1 M2 x 5-mm screws (4) 1428U 2 EMI shield 11. 2X370 Remove the two M2 x 5-mm screws, and remove the daughter card.
1 M2 x 5-mm screws 1428U 2 Hard drive controller card 2X372 12. Disconnect the fan cable. 13. Remove the system board from the computer base. 1 system board See Mini RSL 2 computer base D2389 14. Remove the infrared sensor cover.
Replacing the System Board After you have replaced the system board, insert the floppy disk or CD that accompanied the replacement system board into the appropriate drive, and turn on the computer. Follow the instructions on the screen. NOTE: After replacing the system board, be sure to enter the computer's Service Tag into the BIOS of the replacement system board.
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.
Back to Contents Page Touch Pad 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.
1 touch-pad ZIF connector 2 touch pad cable 9. D1690 If you damage the cable while detaching or attaching it to the touch pad ZIF connector, remove the touch pad cable from the system-board ZIF connector and repeat the procedure using a new touch pad cable.
Back to Contents Page Dell™ Latitude™ D400 Service Manual CAUTION: Follow the safety instructions in the System Information Guide to help protect your computer from damage and ensure your own personal safety. 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.
