I find it hard to believe it is a failure. I think it's more like a bug. When something fails, restarting the system shouldn't fix it!?!? (I'm more of a software person so I don't know). I reset my amp last night after the problem started and there were absolutely no problems for 4 solid hours. I'm going to be playing around with the amp for a while before I take it in. For example, after the problem starts: turning the volume way up, changing the balance back and forth, resetting etc., so that I have as much information for them about how the problem manifests itself and how it can be resolved. Hopefully that will help. I'm convinced they have a design issue on their hands; for example if the volume is at a certain level for an extended period etc. Anyway, if I do find anything out I'll let you know. Good luck with your repaired amp. I do absolutely love the sound from the A29 when there aren't any problems. It sounds better than my old Classe that was much more expensive.