Ok I'm in the shed with an Orbit1 playfield in front of me. The pop bumper lamps and all four rollover switches, 2 on the outlanes and the two next to them run off the GI circuit so they should all be on all the time. They all have blue and black wires on them which is for the GI. So stop looking put it back together and have some fun.
You should clean the playfield with some Mr Sheen and get a new ball to avoid excessive playfield wear eventually.
But have fun and when you're sick of it sell it to me.
