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6. Remove the screw that secures the front audio and USB assembly bracket to the chassis to remove
the bracket from the chassis.
Figure 45. Removing the screw that secures the front audio and USB assembly to the chassis
7. Remove the two screws that secure the front audio and USB assembly to its bracket and remove the
failing front audio and USB assembly from the bracket.
8. Install a new front audio and USB assembly into the bracket and install the two screws to secure the
front audio and USB assembly to the bracket.
9. Install the front audio and USB assembly bracket into the chassis and align the screw hole in the
bracket with the corresponding hole in the chassis.
10. Install the screw to secure the bracket to the chassis.
11. Reconnect the front audio and USB assembly cables to the front audio connector and the front USB
connector on the system board. See “Locating parts on the system board” on page 77.
12. To complete the installation or replacement, go to “Completing the parts replacement” on page 113.
Replacing the internal speaker
Attention:
Do not open your computer or attempt any repair before reading and understanding the “Important safety information”
in the ThinkCentre User Guide. To obtain a copy of the ThinkCentre User Guide, go to:
http://www.lenovo.com/ThinkCentreUserGuides
This section provides instructions on how to replace the internal speaker.
Note: The internal speaker is only available on some models.
To replace the internal speaker, do the following:
1. Turn off the computer and disconnect all power cords from electrical outlets.
2. Remove the computer cover. See “Removing the computer cover” on page 79.
Chapter 8. Replacing FRUs (Machine Types: 4468, 4473, 4476, 4479, 4495, 4497, 4499, 4504, 4513, 4517, 4524,
7021, 7032, 7034, 7049, 7052, 7053, 7073, 7136, and 7178.) 111