Check the GI driver board on the center of the play field. When mine went out it was the 3 pin connector on the upper right corner. Stern sent me a new harness and board. While waiting for the delivery I bush fixed it by sticking a small optical screwdriver in the end of the connector to bend the contacts more so they better secured to the posts when clipped on.

I have also read people saying the data cable from the GI board to the back box has gone bad on them also causing this same issue but tha wasn’t my scenario.

I’d just try to wiggle the 3pin connector while the game is turned on, if you get a flicker that’s probably it.

Awesome, glad I could help. I obviously don’t know when your game was built but mine was from late 2013. What I was told is that stern has since changed those connectors to have more than one contact point to stop this problem from occurring.