Alienware 15 R4 Service Manual

Procedure

Align the screw holes on the touchpad bracket with the screw holes on the palm-rest assembly.
Replace the five screws (M2x3) that secure the touchpad bracket to the palm-rest assembly.
Slide the touchpad cable and touchpad-buttons cable into their respective connectors on the touch pad and close the latches to secure the cables.
Slide the touchpad cable into the connector on the system board and close the latch to secure the cable.