Dell Precision M3800 Owner's Manual page 22

4. Lift the connector latches [1] to disconnect [2] the following cables from the system board:
a) keyboard backlight
b) touchpad
c) keyboard (after peeling off the tape and lifting the connector latch)
d) speaker
5. Perform the following steps to remove the system board from the computer:
a) Loosen the captive screws that secure the system board to the computer.
b) Remove the screws that secure the system board to the computer.
c) Lift the system board off the computer.
22 Retrait et installation de composants