Dell XPS 8930 Service Manual page 42

Figure 18. Disconnecting cables
1 optical drive power cable
3 CPU power cable
5 system board power cable
6 Rotate the power-supply unit cage towards the chassis.
7 Disconnect the hard-disk power cable.
NOTE: There could be up to three hard-disk power cables depending on the quantity of hard-disk drive installed.
8 Remove the screws that secure the power-supply bracket to the chassis.
9 Remove the screws that secure the power-supply unit to the chassis.
10 Lift the power-supply bracket off the chassis.
11 Lift the power-supply unit off the chassis.
42 Removing the power-supply unit
2 routing guide
4 system board