This is an extention of my previous thread about a recently fried amp, and I need some advice from some technically qualified TB'ers. Okay Long and short, I accidentally wired the bridge / mono output from my Crest LT 1000 Power Amp straight into the A / Mono input of same. (with the parallel inputs on my cabinet inbetween )There was a spark and SERIOUS speaker crackling, and shutdown. Now only side A works at all, side B, nothing I cracked her open and removed the board to have a better look. Now, on the B side of the board I can see the sparks came from a flat, rectangular chip or resistor or something thats roughly a centimeter square with three prongs soldered to the board, and and one face of it glued to the flat side or bottom of the heat sink, which lays on its side and runs the length of the amp back to front. The Solder connection to this peice are damaged, and presumably the peice itself is also. There is also a very small blue lined resistor just in front of it that may be damaged. Anybody have any idea what this thing is, and whether replacing it will cure my ails? The board is totally symetrical, so side A has one as well, which is intact... Thoughts?