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CAUTION:
Never remove the cover on a power supply or any part that has the following label attached.
Hazardous voltage, current, and energy levels are present inside any component that has this label
attached. There are no serviceable parts inside these components. If you suspect a problem with
one of these parts, contact a service technician.
To replace the power supply assembly, do the following:
1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect
all power cords from electrical outlets and disconnect all cables that are connected to the computer.
2. Remove the computer cover. See “Removing the computer cover” on page 14.
3. Remove the front bezel. See “Removing and reinstalling the front bezel” on page 14.
4. Pivot the drive bay assembly upward, remove the two screws that secure the heat sink fan duct, and
then lift the heat sink fan duct out of the chassis.
Figure 23. Removing the heat sink fan duct
5. Disconnect the power supply assembly cables from all drives and from the 24-pin power connector and
4-pin power connector on the system board. See “Locating parts on the system board” on page 9.
Note: You might also need to release the power supply assembly cables from some cable clips or ties
that secure the cables to the chassis. Make sure that you note the cable routing before disconnecting
the cables.
6. At the rear of the computer, remove the three screws that secure the power supply assembly. Press the
power supply clip
1 downward to release the power supply assembly and then slide the power supply
assembly to the front of the computer. Lift the power supply assembly out of the computer.
28 ThinkCentre User Guide