Quoted from Tinman761:Ok got player one and credit displays to work. Shows no credits. Can I add credits bypassing the door?
If you have numbers on those two displays and targets are resetting, there’s a 99% chance that it has booted and that it always was booting. If the coin door wiring is messed up and you can’t add a credit, you could post a picture of it.
The Blu-White + Red-Yellow wires on the coin door should get you a credit...
Based on your description above, I want to mention that "getting the game booting" and "getting the game started and serving a ball" are two completely different things.
Here's pic of relevant switches and plug on the MPU in the head from the schematics on ipdb.org:
Screen Shot 2020-12-02 at 10.24.17 AM (resized).pngJ3 on MPU board in head (I5)-->Screen Shot 2020-12-02 at 10.24.44 AM (resized).png