I have an imac G5, and the system volume is stuck, the sound slider is frozen and everything is on mute. When I plug in head phones, it works fine. I believe I can fix it, apposed to bringing it to get checked out at the apple store, because after a few days, sometimes hours, it will randomly work fine again. I tried re-starting and things of that nature. I tried calling apple support but they keep me on hold for literally over an hour and I can't keep the phone tied up. Has anyone experienced this problem or have any idea how to fix it?
(I asked the same general question a few days ago, but didn't get many answers, so I'm posting again in hopes of someone else reading who can help because it's driving me crazy.)