Apple Mac G4 (Power Supply Replacement) - Manual (Page 3)

Power Mac G4 (Mirrored Drive Doors/FW 800) Power Supply - 3
Removing the Installed Power Supply
1. Remove the two screws that secure the optical drive carrier to the chassis. (Figure 2)
Figure 2
2. Slide the back panel off the carrier. (Figure 3)
Figure 3