Hi All,
Appreciate you stopping by and reading. I have what I think is a little bit of an unusual situation based on my reading. I have 2 CPS2 motherboards, "A boards" and two "B boards" D&D SoM and SSFIIX. Recently, I noticed I started to get a blue screen on both.
I thought this was odd since they were running fine since I got them a year ago. I thought if it happened to one, that's understandable, but both at the same time is odd. I spoke with the seller I bought them from to ask for troubleshooting tips since we worked on both and restored them. He mentioned a blue screen is typically indicative of the suicide battery, but he removed them and phoenixed both boards. So I shouldn't be getting a blue screen failure due to that. I tested other PCBs - TMNT TiT, XMEN, GAx2, NeoGeo MVH4, Dogyuun, and Batrider, all of which run without issue.
I thought something might have changed with my voltage since I replaced my Unico Nova Blast's clunky IO board with a Mini Gun SuperGun v2.5, but readouts are consistent at +5.01V. From there, I took the top cover off the A board for SSFIIX and took the B board out completely and seated the boards together without the casing between.
I thought, "It worked! AH, the issue was just the connection due to the casing." I was thrilled. A week went by, and I was able to turn on the cab and boot the games without issue. Leaving SSFIIX up for hours. Over the weekend, the blue screen came back.
At this point, it has remained blue on 7 attempted boots. I left the boards disconnected from each other and removed from Jamma to ensure any residual charge on them was depleted for over 20 hours. Nothing. Just stays blue. With the boards being Phoenixed and other boards working in the cab, any ideas what I can assess next?