Installing The System Board - Dell Precision 5480 Service Manual

6. Open the latch and disconnect the USH board FPC (for models shipped with a USH board) and touchpad FPC from their
respective connectors.
7. Open the latch and disconnect the power button board with fingerprint reader FPC from the system board.
8. Peel the left and right tweeter speakers from their compartments on the palm-rest and keyboard assembly.
9. Unroute the tweeter speaker cables from the metal clips on the system board.
10. Disconnect the left and right speaker cables from the system board.
11. Remove the three (M2x4) screws that secure the right USB Type-C bracket to the system board.
12. Remove the three (M2x4) screws that secure the system board to the palm-rest and keyboard assembly.
13. Remove the system board from the palm-rest and keyboard assembly.
14. Flip-over the system board and remove the four (M1.4x1.2) screws that secure the USH board FPC (for models shipped with
a USH board) and touchpad FPC to the system board.
15. Remove the USH board FPC (for models shipped with a USH board) and touchpad FPC away from the system board.
NOTE: The USH board FPC and touchpad FPC must be transferred to the new replacement system board.

Installing the system board

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:
1. Power button with fingerprint reader FPC connector
2. Audio jack FPC connector
3. Left fan cable connector
4. Left tweeter speaker cable connector
5. Integrated WLAN card
6. Battery LED FPC connector
7. Battery cable connector
8. M.2 2230/2280 solid state drive slot
9. Right tweeter speaker cable connector
10. Right fan cable connector
The figure indicates the location of the system board and provides a visual representation of the installation procedure
.
46 Removing and installing components