i have a hartke bass amp, and the last time i was playing, at the end in a hurry i just unplugged it from electricity, forgetting it was at half volume (200 watt) and with switch on. there was a loud bang at the same time i did it and i realised i forgot to turn it off properly.. then i forgot about it and now when i wanted to play, it doesnt give me anything.. (it turns on and all but no sound) i wasnt using it since then so that is the cause i guess only that i dont know what part could be bad? i checked only fuse and tube, they are ok.. any suggestions where should i look to discover the problem? and yes the bang was really loud... but speakers are good.