I've owned pins for quite a while, but I'm pretty much a newbie when it comes to repair. I'm learning though. I picked up an Eightball Champ and a local guy helped me get the main pcb running. I have some remaining problems:
-Sound board works intermittently, turning the pots, wiggling the connections, I can get it to work for a while, then it stops. Rebuild connectors and replace pots?
-Displays work intermittently. Sometimes they are all up, sometimes nothing, currently nothing. Rebuild connectors?
-Neither pop bumper is firing and the top right kick out isn't firing. It's not a fuse problem.

Thanks for any advice or help!

Thanks for the tips and much progress has been made! Sound board working great, displays working great.

I'm down to just the two pop bumpers not working. I don't know how to test the coils for power, is there a guide anywhere or have any tips? Thanks!!

Yup