thanx for answering, well i tried by playing some mp3 thru it and i got music at the send out and the compression light blinks also.. but the other thing about sending music to return jack i didnt hear nothing anywhere.. so should i consider a bad relay (are those things burning frequently?) at least in my case? thanx

well the speakers are good i tested them and also plug other speakers to amp and there was still no sound.. the thing is i only found one fuse and that was an incoming voltage fuse.. which is ok, and thats why the amp turns on and seems working.. can there be any hidden fuses anywhere else? i looked but couldnt find any..

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.