hey, ok this is my backup amp and im not sure what happened to it i dont think it happened while playing but it was in the back of a van for a few days as we were traveling around and gigging. when i turn it on no lights come on, but i can hear a slight hum. but i dont think its from the speaker i think its from the amp part of the combo. brought it to a music shop and the first thing they did was try a different fuse.. no help. then they ended up just wasting my time and doing nothing so i took it back home. when i first found it was broken and wouldnt turn on i tried a different socket and it worked.. but then again next time i turned it on it was back to broken and has been like that since. so its not sockets or the fuse methinks. im hoping its just something loose inside but what do you guys think? anyone had a similar situation? im having an electrician friend have a look at it soon hopefully hell find something obvious and easily fixable as he hasnt much if any experience with amps... btw.. its well out of warranty had it for years and this is the first problem ive had with it.