Replacing the system-board assembly
NOTE: Before working inside your computer, read the safety information that shipped with your computer and follow
the steps in Before working inside your computer. After working inside your computer, follow the instructions in After
working inside your computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/
regulatory_compliance.
NOTE: Your computer’s Service Tag is stored in the system board. You must enter the Service Tag in the BIOS setup
program after you replace the system board.
NOTE: Replacing the system board removes any changes you have made to the BIOS using the BIOS setup program. You
must make the appropriate changes again after you replace the system board.
Topics:
• Procedure
• Post-requisites
Procedure
CAUTION: To avoid damaging the system board, ensure that no cables are placed under it.
1. Replace the heat-sink assembly.
2. Connect the power-adapter port cable to the system board.
3. Slide the power-button cable into the connector on system board and press down the latch to secure the cable.
4. Turn the system board assembly over.
5. Slide the ports on the system board assembly into the slots on the palm rest and keyboard assembly.
6. Align the screw holes on the system board assembly with the screw holes on the palm rest and keyboard assembly.
7. Replace the screws that secure the system board assembly to the palm rest and keyboard assembly.
8. Connect the coin-cell battery cable and speaker cable to the system board.
9. Slide the keyboard cable, touchpad cable, hard-drive cable, I/O-board cable and optical-drive connector board cable into the
respective connectors and press down the latches to secure the cables.
Post-requisites
1. Replace the display assembly.
2. Replace the memory modules.
3. Replace the wireless card.
4. Replace the battery.
5. Replace the base cover.
6. Replace the optical drive.
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Replacing the system-board assembly 55
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