Service Manual

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
• Entering the Service Tag in the BIOS setup program
Procedure
1. Align the screw holes on the system board with the screw holes on the palm-rest and keyboard assembly.
2. Replace the screw (M2x3) that secures the system board to the palm-rest and keyboard assembly.
3. Connect the power-adapter port cable and the speaker cable to the system board.
4. Slide the touchpad cable into the slot on the system board and press down the latch to secure the cable.
5. Slide the keyboard cable into its slot on the system board and press down the latch to secure the cable.
6. Slide the I/O-board cable into the slot on the system board and press down the latch to secure the cable.
7. Align the screw hole on the display-cable bracket to the screw holes on the system board.
8. Replace the screw (M2x3) that secures the display-cable bracket to the screw holes on the system board.
9. Connect the display cable to the system board.
10. Connect the coin-cell battery and speaker cables from the system board.
Post-requisites
1. Replace the memory module.
2. Follow the procedure from step 3 to step 4 in “Replacing the hard drive”.
3. Replace the wireless card.
4. Replace the battery.
5. Replace the base cover.
Entering the Service Tag in the BIOS setup program
1. Turn on or restart your computer.
2. Press F2 when the Dell logo is displayed to enter the BIOS setup program.
3. Navigate to the Main tab and enter the Service Tag in the Service Tag Input field.
NOTE: Service tag is the alphanumeric identifier located at the back side of your computer.
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