This is great. There is so little info about GamePlan machines. I picked up a very clean Super Nova from someone who no longer wanted it. Plugged it and and it gets 6 flashes and starts a game. Only problem is that no coils will fire, ball will not eject, and no points will score. It is so close to working it's killing me. I'm pretty sure that its not the MPU (it is very clean with no corrosion), so I'm guessing it's in the switch matrix or something like that. Any ideas....I would certainly appreciate any info. Thanks again for some great info!

Thanks! I will try and check as much as I can with my limited knowledge. The coils will fire if I ground the corresponding driver transistor, so I know there it's not a power issue. If I disconnect the connector at J3 on the solenoid board and reconnect with the game on....it ejects the ball but then still nothing else works. For me, It might be better to send the board out if it's the U14 since it looks like that chip is soldered directly to the board. I see that you added a socket at that location before replacing the chip so it might be a bit scary for me but I have worked on a couple old Bally boards so I might give it a whirl. Wish me luck. (here's a pic of the board)

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