About six weeks ago I purchased a power amp for a sixth speaker from my receiver. There are three activation options: on/off as soon as the main on/off switch is pressed; trigger activation; music sense (i.e it switches on when a signal is sensed and off after one is not). For no reason, the music sense has stopped working. The 'always on' still works, so there is no problem with the signal from the receiver. The manufacturer recommends a warranty repair by one of their service centres. Fine.........but I'm always wary of how well others treat your (pride and joy) equipment. The amp's case is immaculate and, seeing as I could use the manual on/off, is it worth risking potential problems? If it came back scratched or marked, I don't think I could justify the repair in the first place. Do I worry too much or do others appreciate my dilemma?