My KAC-9105D amp quit working in the middle of a song. The music was loud, but I have had it louder before without any problems and the subs suddenly quit. All the fuses on the amp and the power line fuse are fine, and all of the wires are fine. The amp's power light doesn't turn on but there is a dim light that lights up with the bass. I opened the amp and I don't see anything fried so I don't think there was a short. The manual said something about a protection mode, could that be the problem and if so how do I fix it? Thanks for the help.