Hi, I wiped my PowerBook at the weekend - as I had planned on selling it but Apple didn't introduce updated/new MacBook Pros... anyway... I have no sound... until I restart the machine. It was fine all day yesterday and today until I went to town (shut it down) but I just noticed that there was no sound when I went to play music in iTunes. Its really really annoying and I need some help to resolve the problem. I press the volume button to get this: So I check System Preferences and this is what appears in the sound Output and Sound Effect: Output Sound Effects What has happened? How can I fix this? THANKS for any help, much appreciated.