I'm surprised at how scorched the board is around R27 & R28. But then, I looked again at your photo in post #9, this thread, that shows the backside of this area and the severely burned trace from the emitter of Q10 (2SA740). I think that trace leads to D8 and to wrapping post 13, which connects to the output transistors on the heat sinks. You've replaced the outputs, are you sure they are (still) good?
Maybe you've done this, but I'll suggest re-checking the area of the damaged trace and the pinouts of your new transistors, as well as every component that connects there. When I rebuilt my 1010, I found it confusing looking at the component side of the board, and working in cramped quarters on the backside (the foil side). The foil traces don't show in the service manual copy I have, because it is reproduced so badly that there is no guide for working on the foil side. Combine working on the backside of a board with no guide and installing transistors with different pinouts, man, this was nerve-racking! I had to recheck every component installation against the schematic to make sure I was installing correct pinouts.