Compaq DESKPRO 2000 SERIES Maintenance & Service Manual page 209

7. Disconnect all power cables from the mass storage devices at the system board.
To facilitate reassembly, note the orientation of each cable connector and the routing of each cable
before you remove it.
8. From inside the chassis, remove the two screws at the front of the power supply that attach it to the
chassis.
9. Remove the three screws that secure the power supply to the back of the chassis
Figure 5-87. Removing the Screws from the Chassis
5-96 Removal and Replacement Procedures