So I've had this amp for several weeks, it was shipped across country used. Worked fine, perfect condition when I got it. Played it last night before going to bed and it was perfect, today I go to use with no changes and now the amp powers on, but I have absolutely no sound. -Plugged in direct and off my pedal board no change. -Second input no change. -Different guitar no change. -I can see in the back that tubes are lit, but with the tube cage I can't see them all. -Speaker cable into amp seams good I bought this amp cause my Deluxe died and I didn't want to be bothered getting it repaired at this time so I bought this. Now I have two dead amps!!! Please ideas?