I have a Power Mac duel G5. We had a power outage the other day and it happened while I was on my mac. Everything works fine except the sound. I have it hooked up to a Aquos TV and the sound is connected to the analog audio line-out port. I plugged in my headphones in the front and don't get any sound through there either. I searched through all the apple support documents but none of them worked. I also took it up to the apple store to have a genius check it out but they couldn't fix it. He ran a diagnostic and said that it shows that its working fine and detects the headphones. They said it would cost a thousand dollars to fix whatever is wrong with it, which is what I am trying to avoid. If there is anyone who can help me out, i would greatly appreciate it. Thanks.