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.

Procedure

CAUTION: Ensure that no cables are under the system board.

1. Replace the heat-sink assembly.

2. Align the screw holes on the system board with the screw holes on the palm-rest assembly.

3. Replace the seven screws (M2.5x5) that secure the system-board assembly to the palm-rest assembly.

4. Align the screw hole on the USB Type-C port bracket with the screw hole on the system board.

5. Replace the screw (M2.5x5) that secures the USB Type-C port bracket to the system board.

6. Slide the I/O-board cable into the connector on the I/O-board and close the latch to secure the cable.

7. Adhere the tape that secures the I/O-board cable to the I/O board.

8. Slide the touch-pad cable into the connector on the system board and close the latch to secure the cable.

9. Insert the keyboard cable, macro-keys backlight cable, and keyboard-backlight cable into their connectors and press down the

latches to secure the cables.

10.Connect the macro-keys cable, speaker cable, power-adapter port cable, and coin-cell battery cable to the system board.

11. Route the coin-cell battery through the routing channel and adhere the tape to secure the cable.

12. Turn the computer over.

13. Connect the logo-board cable, power-button board cable, and tobii eye-tracker board cable to the system board.

14. Slide the display cable into the connector on the system board and close the latch to secure the cable.

15.Adhere the tape that secures the display cable to the system board.

Post-requisites

1. Replace the

memory modules.

2. Replace the computer base.

3. Replace the rear-I/O cover.

4. Replace the solid-state drive.

5. Replace the wireless card.

6. Replace the

base cover.