No they found a cold solder joint! No questions asked, new set on their way! Dealer is great! Checked all wires on pre but found nothing so maybe it was just me playing with it too much. However, like I said it did happen to me last year at one point so it could be just a coincidence that it happened during this time or an intermittent problem. If it happens again, I will call Bryston to see if I should send it in.