Mac OS X 10.1: iBook Mute Button Does Not Respond

When using some iBook models with Mac OS X 10.1, the mute button may not respond after the sound is muted. This leaves the sound muted.
Symptom

After muting sound in Mac OS X 10.1, pressing the mute key does not turn sound back on. The sound remains muted.


Note: iBook (Dual USB) is unaffected.

Solution

Adjust the volume from the volume icon in the menu bar or from the Sound pane of the System Preferences application.
Published Date: Feb 17, 2012