Repair pc engine duo redbook audio

As in a previous thread I have been working on a pc engine duo. I replace all the caps and cleaned the pcb thoroughly. I gained another audio channel that I didn’t have before so I assumed this was rebook audio. However after watching one of my games on YouTube I found I am still missing redbook audio. I have tried my best to tweak the pots and I can’t even get a faint crackle when playing audio discs. I am about to replace the laser and I am also going to replace the op amps if that doesn’t work. Is there anything else I should look for? After cleaning the board I didn’t find any severed traces, however is there an area I should be inspecting again. Btw the board is clean and has no remenants of electrolytic fluid.

 

Any pics?

 

Yep, here this beautiful machine after my repairs.

The other pics are of the op amps I plan to replace. The one by the power rail is the one that the previous owner messed with. What happened to the spoiler button?