I'm fixing a marshall lead 15 for a friend. It had a burned up resistor(r32) that I replaced but I couldn't find a schematic so I guess I winged it and put in a 10k 1/4 resistor there. Now it powers up but I have no output out of the speaker outs.... it has a headphone jack and a line out on the front panel I get output out of them but not the speaker outs. Any help would be appreciated.