First I don't do my own amp repairs so most of what I have seen hear is just chinese algebra to me. Anyway, here is my question. I took an amp to a repair guy that was suggested by a friend. I was having problems with the amp cutting out on me . The guy told me it may be just some dirty pots. I said ok. When I went to pick up the amp he wanted me to see that it was working correctly. So when he turned the amp on he turned the power and standby on at the same time. I was told a long time ago that you first turn the power on, give it a minute then turn the stand by on or on the run position. Isn't it bad the just fire it up like that? The other thing was that the amp started cutting out again and I ended up taking the amp back two more times. He finally either actually cleaned the pots or replaced them. Needless to say I never took my amps back to that guy and he ended up going out of business.