I barely know where to start with this poor pathetic thing. Let's start this with: I have it in for repair, and I made a massive, epic mistake; I started working on it when I was very tired and in a bad mood. It had cheap Chinese knock-off Toshiba outputs installed on the right channel. Fine, I pull them off and swap them, and in my not paying attention state, instead of installing the complementary pair, I installed four MJ21194G transistors and turned it on. POP goes half the 10 amp fuses. Step away, this was the crown on an already rotten day. Return the next day, remove the outputs and discard them, and pulled the driver board. I found a resistor that went open at R42, 150ohm. Replaced it. Found the right side drivers to be open as well, replace them with MJE15032 & 33. Went over ALL the other resistors, replaced out the 180Ohm resistors at R33 and R34 as they were out of spec. Everything else seems to check out fine. None of the small bean transistors test shorted or open. A few appear replaced, so I left them alone. Checked the bias controls, still working and still good. I checked all the emitter resistors, all check correctly. I replace the outputs in the CORRECT compliment, go over everything else, power it on, I hear the relay click on after a few seconds, all is well for about 20 minutes, then both meters spiked halfway up, a hum, then BAM, smacked a 10 amp fuse, and smoked the right side outputs AGAIN. Various obscene words were said, and the feeling of dumping gasoline all over it, and setting it on fire sounded good. And that's where we sit today. I have not touched it again. I just went over the driver board again today, and everything appears to be in the same state as when I repaired it. I did not find anything blown, burned, out of spec or shorted. I know this is my fault for not paying attention and I accept that fact, now I have to deal with fixing this issue. What should I start with?