If it's the power supply im gonna freak out in anger. I don't have any chance to send back the amp to where i got it from with the money i got now. Neither do i have money for a new power supply if thats even possible to get?... Im gonna rage on somebody if it's the power supply or any other thing from inside the amp (i have zero knowledge of whats inside that thing). I just bought the damn thing. And i have paperproof that it's been tested by the people at Marshall.... I will try what you say thanks.... ****!