So, while fiddling around with mounting a LCD in my cabinet for a bit while I work on my CRT, I noted that I was getting no sound from my CPS1. After pulling the board (which has a Chinese 32 in 1 B+C board) I found that most games ran without sound, while a few had a single repeating audio clip (a single sound effect used for all in game sounds). This sounds like a memory issue, and looking at my A board it's a bit of a mess. Lots of obvious repairs over the years. Before I go too deep into diagnostics, or even sourcing a replacement A board I thought I'd ask the group if anyone has an idea where I should start?