I have a Carvin PB200 that has been nothing but reliable, but recently, its been acting up and today was the worst of it. I plug in like i normally do, all speaker wires are intact, instrument cable is good, fresh batteries in my bass....all the stuff that should make it work, but no. I pulled the head out of the combo and all wires seem solid, its as clean as a wistle and the fuse is still good. My problem is, why is it that it sounds like the batteries crapped out in my bass when i just put in 2 brand new batteries? The output is maybe 90% less than normal when its not farting out or completely crapping out. It doesn't go into safty mode, the compressor is off and i just dont know how else to explain it. any thoughts?