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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 73.
3. Remove the front bezel. See "Removing and reinstalling the front bezel" on page 74.
4. Disconnect the front audio and USB assembly cables from the system board. See "Locating parts on
the system board" on page 71.
5. Note the front audio and USB assembly cable routing and remove the screw that secures the front audio
and USB assembly. Then, remove the front audio and USB assembly from the chassis.
Figure 31. Removing the front audio and USB assembly
6. Route the cables of the new front audio and USB assembly through the hole in the chassis.
7. Position the new front audio and USB assembly to the chassis so that the screw hole in the new front
audio and USB assembly is aligned with the corresponding hole in the chassis.
8. Install the screw to secure the new front audio and USB assembly in place.
9. Connect the new front audio and USB assembly cables to the system board. See "Locating parts on the
system board" on page 71.
10. Reinstall the front bezel. See "Removing and reinstalling the front bezel" on page 74.
11. To complete the replacement, go to "Completing the parts replacement" on page 96.
Replacing the rear fan assembly
Attention
Do not open your computer or attempt any repair before reading and understanding the "Important safety information"
in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre
Safety and Warranty Guide, go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the rear fan assembly.
To replace the rear fan assembly, do the following:
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ThinkCentre Hardware Maintenance Manual
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