Sorry for all of the exclamations but tonight at practice my amp started to die or something-i was playing it i checked all the knobs, inputs, wires, etc. but it'd say it has signal [the light would come on] but no sound would come out. I went to the local fender dealer-they don't service, i called mars they don't service [where i got it], got a number for a place that does but they're not taking calls before 1 due to large number of work orders. Marching Band State Comp. is this saturday. got any ideas?