See second page....I found the problem and fixed it. I am hoping someone can give me some advice on where to start checking to figure out whats wrong with my Peavey TNT115. Here's the symptoms; I have to turn the gain and master control to 10 to get any output from the amp, even then the output is very low. When I plug into the effects return/preamp in the output is a bit louder. I took it apart and see nothing obviously burned or damaged. The three fuses are good. I took them out and checked them with a DVOM. The jacks and knobs appear to be securely soldered to the board still. The power chord is damaged where it goes through the chassis. The grommet is gone and the white and black wires are missing insulation from rubbing on the chassis. I assume that at some point these wires shorted to the chassis and damaged something in the amplifier circuit. I'm going to get a new power chord (also the ground is broken off the plug) and grommet today. Any ideas an where to start?