when u break down a pinball machine to its basics, u soon learn that some things from the wiring harness onwards are pretty basic, and straight forward to learn if u like this sort of stuff...spending many years with electronics n wiring in security industry taught me alot for fault finding and a alrm in many ways is like a pinball machine, espescially chasing cablkes, fault finding and working out what parts are faulty, playing up etc. The computer boards on sec stuff is sooo much more modern compared to older 90's dmd pinballs so all these old parts appear on the old computer boards in pinnys, and thats where Beaky comes in, otherwise, yes u can learn via a part-time tafe or online course....

or, buy Andy(Beaky) a few bourbans n he can teach u in a few hours what it will take in a month on a course.lol

**Note, its good to see more people interested in the workings of a pinny, but since John(Dendoc) is one of Australia leading specialist surgeons,  its not hard to see why u want to know how it works properly. great idea.