Quoted from cougtv:
Somewhat. The few lamps still out (with new LDU) kinda bug me. The LDU fixed most of my lamp problems actually. I figure it is probably a broken wire or harness issue. I was sold this when I knew no better about pinball and trusted a fellow. I hope I can get 500 out of it, which I should with the new MPU, and other new / spare parts in it. If someone would try and low ball me on it though, I would throw them out on their ass..............
I guess I will place a market add this weekend.
Any chance someone has a Lamp Matrix chart for this beast?
There is no lamp matrix per se in a GP machine. It is like an early SS Bally where each lamp is driven by its own SCR. The playfield schematic shows all the lamps as well as the conector and driving transistor for each on the LDU.
The harness connectors between the playfield and head are a common problem with the pins getting corroded. You can try unplugging/replugging these a few times to see if it solves the problem. If it does, you probably need to repin.