Dell D13S Service Manual page 53

2. Remove the:
a) cover
b) front bezel
c) 3.5-inch hard drive chassis
d) drive cage
3. To remove the power switch:
a) Remove the 6-32xL6.35 screw that secures the IO bracket [1] to the chassis and open the IO bracket[2].
b) Disconnect the power switch cable from the connector on the system board [1].
c) Press the power switch retention tabs [2] and pull the power switch out from the computer [3].
Removing and installing components 53