Did you figure out what was wrong with the flipper staying energized? I have a Stern Flight 2000 that has the same problem with both flippers. I was thinking it might be an issue with the flipper relay on the solenoid driver board. If you solved the issue, it might save me some time.
I have a mpu on a bally space invaders that does blink 7 times but dosent play the power up tune nor does it start a game, any suggestions? I would appreciate it.