while practicing last weekend half way through a song i noticed i could no longer hear my guitar so i waited and checked to see what the problem was. not quite sure what happend but for some reason all the distortion and volume went off. i just bought a new valveking head and thought crud mabey i already blew a tube, so i plugged in my other guitar and everything was fine so i tried plugging the ltd back in still screwed up, any one have a clue what the problem could be?