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 the Lenovo Support Website.
This section provides instructions on how to replace the internal speaker.
Note: Not all computers have the internal speaker.
To replace the internal speaker, do the following:
Turn off the computer and disconnect all power cords from electrical outlets.