btw the monior is the big money in that machine.. working dual res monitor like that goes for $175-250 depending on screen burn and picture quality. Supposedly some of the sound boards work in other sega games too..
I worked on one of them before... IIRC it had some bad solder joints, and they're notorious for having a bad C433 (10uf 50v) and R433 (2.2k ohm), and sometimes R436 (15k ohm).