My iMac G4 constantly gives a constant static sound unless I mute it. When I try to play a sound, like music or sound effects, I just get loud screeching even at low volumes. The static is there regardless of whether the speakers are plugged in, so I don't think they are the culprits.
What on earth could be going on here? The problem just began with the most recent startup, and I can think of nothing that would have led to it.
1. Internal mic is turned on, but it's on by default isn't it?
2. Speakers are just the ones that come with an iMac G4.
The only thing I can think of is that the speakers might not have been plugged in properly. I've using the firewire port next to the speakers port a lot recenly, and I may have loosened something.
Anyhoo, as I said, everything seems fine since I restarted. I ran Disk Utility and MacJanitor for good measure, and ensured the speakers were properly plugged in.
Thanks for your help.
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The first thing that comes to mind is that your Pro Speakers may not be plugged in all the way. Apple's design of the propriety jack for the Pro Speakers makes it easy for a user to think they're plugged in properly, when they may not be. Try giving the plug a gentle extra push; you may feel that last "click" which means the jack is at last seated properly.
If they are indeed plugged in all the way, it could be a problem with your logic board, unfortunately...