Dell Alienware M14x R2 (Early 2012) - Manual (Page 49)

Postrequisites
1 Replace the palm-rest assembly.
See "Replacing the Palm-Rest Assembly" on page 44.
2 Replace the keyboard. See "Replacing the Keyboard" on page 39.
3 Replace the center-control cover.
See "Replacing the Center-Control Cover" on page 35.
4 Replace the battery pack. See "Replacing the Battery" on page 18.
5 Replace the base cover. See "Replacing the Base Cover" on page 16.
6 Follow the instructions in "After Working Inside Your Computer" on page13.
Power-Button Board 51