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 internal speaker.
Note: The internal speaker is only available on some models.
To replace the internal speaker, do the following:
Turn off the computer and disconnect all power cords from electrical outlets.