This is my first time seeing the inside of a neo geo and I have no experience with a hantarex, it appears there is no vertical pot. there's a connection for V/H/RGB but it goes directly into the board. I'm sure you guys with experience on these things know what I'm talking about.
Now I'm hoping this isn't a resistor issue and that there is actually a way to manually adjust the vertical scrolling on this thing.
Any tips would be appreciated