I haven’t posted this story yet, but I moved all of my arcade machines and pinball machines from my basement into my shop in my backyard. Everything worked before the move. But we had to carry all of the machines up a bunch of steps, across a yard and into the shop. One thing to remember about old games is that they DO NOT like to be moved!
So a few games stopped working after we moved them, including Twilight Zone. Argh,, So the game would boot up give a test report. When I start a game and hit a flipper the game would restart/reboot. This can be from a voltage drop, Super easy to check with your multimeter. Be remember the game worked BEFORE the move. My voltage was on the Driver board was dead on and did NOT drop when I hit the flippers. So next thing is to check the connectors. Games like Twilight Zone have a ton of wires, cables and connectors. This is mostly likely the problem after moving a game. I reset all cables and connections and still had the problem. So now I focused on J101 on the Power/Drive board, I played with the connection and pushed the wires in further into the connector. Turned Twilight Zone back and and now it’s working 100% again!!