Welcome to Pinside! It is a great community and an invaluable resource. A collaboration of minds and experience to assist are available. I used to have a Cue Ball Wizard myself. Keep in mind these games are based around solid state computer electronics, the more experience you have in this arena will accelerate your abilities to repair these games. If you do not have computer electronics experience your learning curve will be greater (but it can be done). Reading the online pinball repair docs such as PinWiki, and discussions here are an excellent starting point to repairing and maintaining your games. Gather the knowledge first before.diving in - as it can save you from making a situation worse. The more specific and detailed your questions are will help the team here make better suggestions to guide you.

Check power supplies and fuses first. Any CPU LED status activity? You can power up the board with a computer power supply +5 DCV to determine if it is dead

The chips in the back box are not a good sign. And difficult to trust. Some of these are ESD (static) sensitive and need to be handled with special precautions. If the previous owner has ever plugged and unplugged cables from the DMD controller, that can fry the U8 GAL IC. http://www.pinrepair.com/sys3/#display

That game is great fun for the shots, especially up to the top corners. I first played this at PAPA pinball and was just having a long and outstanding game, until they pulled the plug on me at closing. The video modes kind of sucked though, and some other small details. Had it for awhile and moved it on to someone else. Glad you got it running, have fun!