I temporarily lost all sound on my MacBook Pro. I hooked it up to my television and had good sound. Then I unplugged it from the TV and lost all sound. I couldn't get sound through the speakers on my computer, television, or iPod headphones. I went online and searched for similar problems. I was amazed at how many people had the same problem. Many of these people were forced to send their computers to Apple to have it fixed. I found this: http://discussions.apple.com/thread.jspa?threadID=814884&tstart=0 The question I have is should I be worried?