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):
a. Remove the screws that secure the PSU to the computer [1].
b. Disconnect the PSU cables from the connectors on the system board.
c. Unroute the PSU cables from the retention clips.
d. Press the metal release tab [2], slide [3] and lift the PSU out of the computer [4].
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