I just got my PBO last week and I've encountered this problem almost from the start. When I first connected it the audio was fine from both movies and songs. However when I turn it off with the remote and then later turn it on, the audio is gone. (Not every time, but I'd say over half the time.) The video plays but no sound comes through. To get the audio back I have to shut it down and unhook it from power for a few seconds. (Turning off the switch on the unit does not help.) Of course this means I have to run it back through setup after I turn it back on, which is a pain. The audio then works fine until I turn it off again. If it didn't have a fan I'd just leave it on all the time.
Any ideas on how to fix this or stop it from happening? Thanks.