2256 Views 2 Replies Latest reply: Jan 25, 2010 12:42 PM by Dah•veed
Unfortunately, this may be a repair problem. I've had this happen several times after opening the Mac Mini to upgrade the memory or disc drive. There's a very thin and flimsy ribbon cable going from the logic board to the back of the DVD drive. It comes loose very easily. If it's jostled even slightly you'll lose your sound hardware. For some reason you may not notice this right away, but the next time you reboot the system the hardware will vanish, as far as Mac OS is concerned. Whether you're running Tiger, Leopard, or Snow Leopard doesn't matter, it's a hardware problem. Was the system dropped or jarred? Last time this happened to me a heavy object fell on the desk and although it did not hit the computer, it bounced it around a bit. I finally gave up repairing it, (would have been the third or fourth time) and got an external USB sound device (I got a Griffin iMic, but others are good too).
Take it to the Apple dealer, if it's under warranty. Otherwise consider getting the external USB sound hardware.
Try a PRAM reset;
1. Shut down the computer.
2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
3. Turn on the computer.
4. Immediately press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
5. Continue holding the keys down until the computer restarts, and you hear the startup sound for the second time.
6. Release the keys.