A friend has that Monte Carlo Gottlieb 80b that's been acting weird lately.
So it enters test modes when we press start.
I realized the reset board wasn't connected, so I connected it.
The machine wouldn't boot (no display, but lights on).
So, I switched it off and disconnect the reset board.
Then the game would work correctly for a while. But not for long
I'm thinking the reset board is faulty..?