Stuck on Green screen CP2 Multi.

[Arcade-Projects]

Nightwarriors Darkstalkers board Rev 3 PalF

Board was a suicided battery melt functioning fine with a infinikey.

I removed the infinikey and installed the multiboard, formatted sd provided by HSS, copied rom rollup basic. One rom did boot MVC unlocked with jailbars. I read that the roll up is encrypted now so I went back and did the key writing wires. Nothing has worked since.

Green screen except when writing rom and key which then it switches to black screen and switches back to green after completion.

Pins look good, Ive reseated the boards twice.
reformated SD card(windows)
Tried several roms
verified continuity for key writing pins.
Donor board worked previously, but I also tested a spare XVS which works fine.

Pictures attached

My soldering jobs not the greatest, I did low heat 230c, nothing looks damaged.

I'm out of ideas. I was trying to find decrypted roms so I could see if maybe my key writing isn't actually working, but no one seems to be posting them anymore. I cant find a link to the latest firmware but this board is only a week old.

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