Have what appears to be a fully working Flash Gordon, but I get a switch 3 (top single target) error during self test. I don't know if it's related, but all the target diodes show reading in both directions when down or closed. When the targets are up or open, the diodes read as expected.

It does have an added cabinet button wired from coin switch if that matters. I had original board and altek MPU and get same mystery error. Game appears to work 100% even though this error is showing up.

Thanks in advance for the help.

I'm also restoring this FG. I have a CPR lower playfield section and plan to have HSA restore upper section. Attached some pictures cleaning and rebuilding one of the target banks I did today.

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