I had a similar System 80 problem recently that I had not previously seen, and it was due to flaky female connectors on the power supply. Rebuild those and you'll likely be set.

I meant the connector on the harness. If you've replaced the connector to the CPU from the power supply, that should've done the trick, but I'd suggest repinning the other connectors, especially your connector from the bridge rectifiers.

Sorry Bruce, sometimes I think I'm being clear when I am not.

The displays get their power from the power supply. The CPU works some magic as well, but let's rule that out for now.

The power supply is where we want to focus. I do not have a game in front of me to tell you connector numbers/letters, but each of the connectors on the powers supply should be rebuilt. use .156 trifurcon pins and molex connectors, which you can can purchase for pennies at great plains electronics. You will also need a crimping tool if you do not have one. Cut the wires one at a time, strip the end, then crimp the new pins on and slide into the connector housing. Doing it one at a time will prevent you from making a grave error.

I hope that is more clear. Let me know if not.

-Nick