My snes board is shvc-cpu-01. it has the removable sound module and my system is having some strange audio behavior. I replaced all the capacitors except for the 1000uf 25v rubycon at c67 because it seemed ok. Replacing the capacitors did nothing so i'm thinking that the sound module may be bad. Any tips or suggestions are appreciated. Here's an example of what i mean: https://youtu.be/axiNo6s4dKQ