I just picked up a Centaur and all was good for weeks until this morning I went to turn it on and everything lights up but no displays and cannot start a game. I am VERY new to the classic Bally games and could use some ideas of where to start to find this problem. Thanks in advance for any help.

The LED on MPU is NOT on at all.

Thanks everyone. It was a blown fuse on the board in the cabinet. She's running like a champ now. I think sometimes I let the complexity of these things throw me off. I would think that checking fuses is the first step always, but I am far from good at troubleshooting pins.