Do you have other Spike 2 games you can swap a few components with? I'd start with the power distribution board in the back box.
Given that you're not getting a few of the voltage lights on the CPU board, it's either power distribution or a bad cable. I have had cables fail. The crimps are the weak point. Sometime, they barely touch the wire, crimping over mainly the insulation. Try wiggling each cable (by the wire as well) to see if you can get the additional voltage lights. You might isolate a bad connector that way.
Orlando, FL
