Installing The System Board - Dell Inspiron 27 7720 All-in-One Owner's Manual

Figure 55. Lifting the system board off the chassis
Steps
1. Disconnect the touchscreen cable from the system board.
NOTE: This cable is only available on computers that support the touch option.
2. Disconnect the camera cable from the system board.
3. Disconnect the backlight cable from the system board.
4. Disconnect the fan cable from the system board.
5. Disconnect the speaker cable from the system board.
6. Disconnect the microphone-module cable from the system board.
7. Open the latch and disconnect the media-card reader cable from the system board.
8. Open the latch and disconnect the power-button board cable from the system board.
9. Open the latch and disconnect the display cable from the system board.
10. Remove the six screws (M3x5) that secure the system board to the display-assembly base.
11. Remove the solid-state drive screw mount (M3x4) that secures the system board to the display-assembly base.
12. Lift the system board off the display-assembly base.

Installing the system board

CAUTION: The information in this section is intended for authorized service technicians only.
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The following image indicates the connectors on your system board.
Removing and installing Field Replaceable Units (FRUs) 83