This machine would sometimes make the score sound for a really long (and annoying time). Decided it had to be one of the caps on the board next to the 555s. Capacitance on the 1uF measured at 3.5uF and the 4.7uF measured about 9. Changed them both. Now have a nice short score beep.
Would still like a copy of these schematics if anyone has them. I do have copies of schematics for allied games in the same year so that might help the next time something else goes bad. See it at this years CAExtreme show.
dale