I remember pre-op-amps are a known weakness on S32. They should be TL084 or TL074 type IIRC.
Anyway you can't diagnose your board by just looking at it unless something clearly went in smoke (and still you won't know if it's a cause or a consequence).
First thing to do is identify if the issue is digital or analog, but for that you need minimum tools, skills and knowledge. Starting a blind repair is just going to waste your time and discourage you.
What tools do you have handy?
- faulty Space Harrier or Enduro Racer
- Super Nintendo CPU (3 needed)
- Sega trackball I/O board 837-8685 (will be reproduced and gerbers made freely available)
"I'd 1cc games but I have a real life." 01010011 01000101 01000011 01010010 01000101 01010100 00100000 01001101 01000101 01001110 01010101 00100000 01000111 01010101 01011001