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 six screws (M2x2) that secure the system board to the palm-rest and keyboard assembly.
3. Slide the I/O-board cable into its respective connector on the system board and close the latch.
4. Slide the keyboard back-light cable into its respective connector on the system board and close the latch–Optional for
computers shipped with backlit keyboards.
5. Slide the keyboard cable into its respective connector on the system board and close the latch.
6. Slide the touchpad cable into its respective connector on the system board and close the latch.
7. Connect the speaker cable from the system board.
8. Align the screw holes of the USB Type C bracket with the screw holes on the system board and palm-rest and keyboard
assembly.
9. Replace the two screws (M2x5) that secure the USB Type C port bracket to the system board.
10. Connect the power-adapter port cable to the system board.
11. Connect the display cable to the system board.
Post-requisites
1. Replace the memory module.
2. Replace the heat sink.
3. Replace the fan.
4. Replace the solid-state drive.
5. Replace the battery.
6. 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.
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54 Replacing the system board
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