FS Marvel vs Capcom A and B Boards CPS2 with Sound issue

[traplicious]

Game works but some sounds are missing. Mostly background music and some sound effects in game. Not sure if it’s A or B board but I believe it’s on the A board.

I checked all of the chips on the B board using chip reader and everything checked out ok.

I was the first person to open this board up. I have removed the battery and installed an infinikey so that it will boot without having the need to change out the battery every couple of years.

Game plays fine and doesn’t have any graphical errors just missing sounds. Could be an easy fix but I don’t know where to start.

Thanks for looking!

 

[traplicious]

Asking $200. Thanks for looking.

 

[chrischunli]

Pm’d, thanks!

 

[gts072]

@traplicious Did you check the B board with another working A board to see if the sound was playing correctly?