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4. Remove the screw that secures the front audio and USB assembly to the
chassis.
5. Remove the failing front audio and USB assembly from the chassis.
6. Install the new front audio and USB assembly into the chassis and secure it
with the screw.
7. Connect the front audio and USB assembly cables to the system board.
8. To reinstall the front bezel, align the plastic tabs on the bottom of the bezel
with the corresponding holes in the chassis, and then pivot the bezel inward
until it snaps into position.
9. Go to “Completing the parts replacement” on page 30.
Replacing the AC power adapter
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 AC power adapter.
To replace the AC power adapter:
1. Remove any media from the drives, shut down your operating system, and
turn off all attached devices and the computer.
2. Disconnect the AC power adapter cord from the electrical outlet.
3. Locate the power adapter connector. See “Locating connectors on the rear of
your computer” on page 7.
4. Disconnect the AC power adapter cable from the power adapter connector.
Figure 23. Removing the front audio and USB assembly
Chapter 2. Installing options and replacing hardware 27