Ugh! Sorry about that. I forgot about the crowbar (CR20).
I hope R58 (0.2R) didn't cook too badly. You should probably leave R101 disconnected for now.
However you did reveal some information... that the output remained at 34.7V and didn't ramp up from this value after power-up. Also, since you replaced Q9 (and earlier U9), you've confirmed that the problem must be upstream of U9B inputs.
I don't recall if you measured U9C pin 1 (output) if that was experiencing a ramp-up after cold power-up. If you see it moving from 1.1V to 1.25V (WRT +OUTPUT/GND) then that would explain a movement from 4.3V to 5V on the output; with Vset knob set for 5V.