QSC GX5 fault, anyone dealt with similar?

So I’ve the QSC GX5 that powers up fine, however CH1 shows permanent clip and signal lights (even without a source connected or load connected, and will not produce an output. Now CH2 does produce an output, however clips at little to no input source and distorts heavily.

I’ve acquired a schematic off the interwebs and upon inspection of the pcb, found two resistors within the peak limiter fried, and have since replaced them, but this hasn’t solved either issue.

Beyond that I can’t see any noticeable damaged components, output fuses haven’t blown, so would suspect the transistors are alright?

Thanks all 😊