Replacing the system board
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
1. Connect the power-adapter port cable to the system board.
2. Adhere the tape that secures the power-adapter port cable to the system board.
3. Turn the system board over.
4. Align the screw holes on the system board with the screw holes on the palm-rest assembly.
5. Replace the two screws (M2x3) that secures the system board to the palm-rest assembly.
6. Connect the touch-pad cable and close the latch to secure the cable.
7. Connect the speaker cable to the system board.
8. Connect the I/O-board cable and close the latch to secure the cable.
9. Connect the hard-drive cable and close the latch to secure the cable.
10. Connect the power-button board cable and close the latch to secure the cable.
11. Connect the display cable and close the latch to secure the cable.
12. Adhere the tape that secures the display cable to the system board.
13. Close the display hinges.
14. Align the screw holes on the display hinges with the screw holes on the palm-rest assembly.
NOTE: These instructions are applicable only for laptops with a non-touch screen display.
15. Replace the screw (2.5x8) that secure the display hinges to the palm-rest assembly.
Post-requisites
1. Replace the fan.
2. Replace the heat sink.
3. Replace the memory modules.
4. Replace the wireless card.
5. Follow the procedure from step 2 to step 8 in “Replacing the base cover”.
6. Replace the keyboard.
7. Follow the procedure from step 4 to step 5 in “Replacing the optical drive”.
8. Replace the battery.
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54 Replacing the system board
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