My Flash Gordon powers up but won't go into attract mode.
I get the seven flashes of the MPU led, but they will either loop, or the led will stay on after the seventh flash, or it won't. Sometimes some lights on the playfield and some solenoids will get stuck on.
Given this variety, the repair guide for those Ballys would suggest to me that it can be anything on the MPU board.
Where should I start (and how) ?