Dell Precision Tower 3620 Owner's Manual

Removing the power supply unit PSU

1. Follow the procedure in Before Working Inside Your Computer.
2. Remove the cover.
3. Press the tab of the 4-pin power cables and disconnect it from the system board [1,2].
4. Release the cables from the clip [3].
   
5. To remove the power supply unit (PSU):
   1. Remove the screws that secure the PSU to the computer [1].
   2. Disconnect the PSU cables from the connectors on the system board.
   3. Unroute the PSU cables from the retention clips.
   4. Press the metal release tab [2], slide [3] and lift the PSU out of the computer [4].