Dinoking conversion monitor problem

[Arcade-Projects]

Hoefully someone can help. I converted a Dinoking cab recently and it all works great with Retropie.
I recently bought original CPS3 hardware and that works great too.

I then bought a load of CPS2 hardware and Neogeo64 and a handful of other systems (that support 15Khz) but the picture is messed up. See the screens below. They are fully working as I get sounds, controls, coin etc, but the image is scrambled. Any ideas? It's strange, as the Raspberry Pi and CPS3 hardware display prefectly.

Any ideas?







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