So I have a local 1979 Harlem Globetrotters that I'm thinking about picking up for $800. Everything looks good on it as far as playfield and backglass. Seller claims it worked 100% before moving, now only half the lights turn on. I don't know much more than that. I also am not familiar at all with teching these older machines, my only limited experience is on newer Sterns. So potentially I know there are a load of things that could be wrong, but any ideas on how deep I'm getting here/cost? Give me some insight into whether it's a mistake. It's not far from my house so I can go look at it, what should I be checking / looking for? Keep in mind my noob abilities.
Attached a pic.