I'm not allowed to read your post over at KLOV even after loggin in, so I don't know if you need different kinds of repairable boards or not.
I have an old Sega Ninja (or sometimes called Ninja Princess) board that has some weird graphical issues. The SEGA NINJA letters on the title screen are wavy pink and white instead of normal... and in game, it seems like colors are off with white or pink as well.
Do you need boards to work on? I can send that out if you need something... the game itself works fine (tested issue on original cab as well as with jamma adapter on my candy), so that may just be a graphical trace or fix somewhere...
let me know and i'll be happy to send it over for your party. if you destroy it trying to fix it then that's OK as long as everyone learns something