So, I started with a Street Fighter II: WW board I brought 100% back to life from a bunch of parts. After I took the board out to add EPROM stickers, I put it back in my bartop and found the sound was out. Two hours pass troubleshooting.
In the end, I found the issue. If one of the B ROM board resistor jumpers is not attached during powerup, it can lead to completely dead audio. If contact is made during the game, the audio is still dead. I'm sure this can be the cause of other issues as well. These resistor jumpers are off white in color with a black band, arranged in groups of four.
My boardset has been knocked around a lot and the jumper was just sitting on the metal pad, making enough contact for it to work. It will be fixed properly tonight. Something easy to look for when troubleshooting CPS-1 boards.
In the end, I found the issue. If one of the B ROM board resistor jumpers is not attached during powerup, it can lead to completely dead audio. If contact is made during the game, the audio is still dead. I'm sure this can be the cause of other issues as well. These resistor jumpers are off white in color with a black band, arranged in groups of four.
My boardset has been knocked around a lot and the jumper was just sitting on the metal pad, making enough contact for it to work. It will be fixed properly tonight. Something easy to look for when troubleshooting CPS-1 boards.
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