Dell Alienware M14x R2 (Early 2012) - Manual (Page 48)

3 Carefully lift the power-button board and release its cable from the slot on
the palm-rest assembly.
1
2
1 power-button board 2 screws (2)
3 power-button board cable
3
Replacing the Power-Button Board
Procedure
1 Slide the power-button board cable through the slot on the
palm-rest assembly.
2 Use the alignment posts on the palm-rest assembly to place the
power-button board in place.
3 Replace the screws that secure the power-button board to the
palm-rest assembly.
4 Adhere the power-button board cable to the palm-rest assembly.
Power-Button Board 50