Yes all three boards are identical. I was making some measurements between the good board and the bad board and the only difference was in one of the op amps UPC1270H. I ordered a replacement from China because that is the only place I could find them. Waiting on them now.
This morning I was doing some more testing and saw the smoke. I think the power transistor made contact with the chasis. Anyhow I shorted out a pair of the power transistors. 2SD2066 and 2SB1373.
I can't find any replacements and I don't know how to find a substitute. Does anyone have the knowledge and time to check if these transistors have a substitute. Thank you