I have a Space invaders pinball with lamp problems. Most back glass does not light with some play field lights not working. I have checked all lamps and they are not burned out. I have cross checked them to ground and they light. I have replaced the lamp driver board, the aux lamp driver board. I found questionable voltage and replaced the solenoid driver board. I replaced the voltage regulator rectifier board this solved the issues with the full time lamp outages issues. I still cannot seem to get the rest of the infinity lights to work or some of the creature lights. The last thing to replace is the MPU board. However do any of you know if this wire is supposed to be missing on this connection? It is basically powered backwards so it has power from the back glass. I just did not know and cannot find in my documents if this was supposed to have power from this side as well. Its the large blue one. I have also re connected all grounds to the perspective boards and re wired and cleaned all plug connectors and re soldered all posts into there boards. Pulled and reseated all chips. Checked for corrosion from the batteries.

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Any one have thoughts on this?

Thanks for the response I tried just about everything. Finally i found one flaky wire on j1 from the MPU board re crimped a connector and everything started working!! I spent probably 100 hours total trying to figure it out. I did replace lots of stuff that actually probably needed it any way. I found bad voltages and all kinds of stuff just waiting to cause problems.

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