I have a Tibook (1Ghz) that will only play audio from its left speaker. This includes music in iTunes, as well as system noises such as emptying the trash. I had been watching a movie earlier this evening (in DVD Player) through external speakers via the headphone port with no problem. I had both right and left audio output. The problem arose after quitting DVD Player and attempting to play music in iTunes. Now all I can get is left audio whether through headphones, external speakers, or the built in speakers. I have tried restarting the computer, but the problem persists.
I would appreciate any help or suggestions. Thanks!