Just out of curiousity, what does it sound like when a transformer goes bad??? Do the lights come on, tubes glow, and the second you flip the STANDBY switch on, it starts humming LOUD! Then it gets louder and louder, as it starts vibrating.... Why do I ask? Oh just wondering becasue that is the exact thing my amp has been doing tonight! I am about ready to break something! I just got this thing back from the repair shop to get rebaised and a set of power tubes replaced last week.