I ask because after about 3 days of me using my new AX-2000 model , It stopped working, but looking through the glass backing it doesn't look like anything is damaged on the circuit board at all, yes I checked all power wires/ground/speaker wires/remote wire before I came to the conclusion that it's something in the amp. So I was wondering is there a hidden/built-in fuse somewhere on this amp that would blow before the amp fries, if so where is it?