I've recently acquired a Capcom CPS1 Final Fight cabinet, and of course it doesn't work. There is no sound, and the picture is garbled at best. Occasionally it does sync up but it has no color then promptly goes back to being crazy. All the inputs work as I sat and watched scrambled game enough to see the character move and attack. I did remove the monitor and converted it to NTSC output on my TV, so maybe it is a grounding issue, but I don't think it is. The convector does work as i have an outrun that it was being used for.
I've tested the PSU, +5.05, -4,95, and +10.20 without being plugged in and +12.15 when under load. I'm assuming that those are within tolerance, although the +10 made me question it.
No traces have been burned, and i did not notice any burned resistors.
I've reseated all the EPROM's although none of them had any noticeable corrosion. Checked the sound pot to make sure it wasn't comletely off.
Now short of those things I'm at a loss for what to check next. I understand a common problem with these boards is the GPU, Sound Chip, or Processor crapping out and the best way to fix the board is just to purchase a "new" A board and swap it out. I just wanted to see if there was anything else that I could look at before i went that route as I'd like to be able to troubleshoot these a bit better, or at least pretend I can.
Here are two pictures. The first is a picture of the character select screen i believe, and the second is the actual gameplay, not that you can tell much about it.


I've tested the PSU, +5.05, -4,95, and +10.20 without being plugged in and +12.15 when under load. I'm assuming that those are within tolerance, although the +10 made me question it.
No traces have been burned, and i did not notice any burned resistors.
I've reseated all the EPROM's although none of them had any noticeable corrosion. Checked the sound pot to make sure it wasn't comletely off.
Now short of those things I'm at a loss for what to check next. I understand a common problem with these boards is the GPU, Sound Chip, or Processor crapping out and the best way to fix the board is just to purchase a "new" A board and swap it out. I just wanted to see if there was anything else that I could look at before i went that route as I'd like to be able to troubleshoot these a bit better, or at least pretend I can.
Here are two pictures. The first is a picture of the character select screen i believe, and the second is the actual gameplay, not that you can tell much about it.


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