You may be dead on with the stray wire. We had company the night before and I know my wife was shifting some things around. I have another reciever that I don't use very often that I may try the Bose on just to make sure. Then I'll reconnect them to the H/K. I really like my H/K ,although, I have read others having issues with its protect mode. I really hope its not a reciever malfunction. If it should happen to be that the Bose themselves are dead and I can prove that it was my lovely wife that may have causes the incident then maybe a pair of QS8's are in my near future : )