Dell XPS 8910 Service Manual page 54

2 Rotate the power-supply unit cage away from the chassis.
Figure 14. Rotating the power-supply unit
1 power-supply unit cage release
latches (2)
3 chassis
3 Disconnect the CPU-power cable and system board power cable from the
system board and the optical-drive power cable from the optical drive.
For more information, see
4 Disconnect the graphics-card power cables if applicable.
54
"System-board components".
2 power-supply unit
4 power-supply unit cage