I have a Gottlieb Sinbad solid state (1978) which has had a Game Over issue since I got it.
Original boards installed
Here is the scenario:
Every 10 - 15 games, the game ends (usually on ball 2) with the Game Over lights illuminated. (Does not look the way a Slam Tilt does on a System 1) The ball is usually between the pops and the spinner when it happens. The game ends for all players.
I did disconnect the lock out coil however the same problem occurred. I also inspected under the playfield and did not see any wiring issues. What seems puzzling is that it is usually on ball 2.
This is my first Gottlieb game so I am a little unsure of the next steps. Any assistance would be greatly appreciated.