Installing The System Board - Dell P46E Service Manual

Steps
1. Remove the two screws (M2x4) that secure the USB Type-C bracket to the system board.
2. Lift the USB Type-C bracket off the system board.
3. Remove the screw (M2x4) that secure the display cable to the system board.
4. Open the latch and disconnect the display cable from the system board.
5. Open the latch and disconnect the I/O-board cable from the system board.
6. Open the latch and disconnect the touchpad cable from the system board.
7. Open the latch and disconnect the keyboard cable from the system board.
8. Open the latch and disconnect the keyboard-backlight cable from the system board.
9. Open the latch and disconnect the light-bar cable from the system board.
10. Disconnect the speaker cable from the system board.
11. Disconnect the coin-cell battery cable from the system board.
12. Open the latch and disconnect the G-key cable from the system board.
13. Remove the five screws (M2x2) that secure the system board to the palm-rest and keyboard assembly.
14. Lift the system board off the palm-rest and keyboard assembly.

Installing the system board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
NOTE: The Service Tag of your computer is stored in the system board. Enter the Service Tag in the BIOS setup
program after you replace the system board.
NOTE: Replacing the system board removes any changes that you have made to the BIOS using the BIOS setup
program. Make the appropriate changes again after you replace the system board.
About this task
The following image indicates the cables on your system board.
Removing and installing components 67