Just picked up an nice, very clean El Dorado City of Gold. Everything seems to function as it should, with one bothersome exception. During play, and only occasionally - the play field lights "flicker" in unison. It might last a few seconds, or up to a minute or so. When a new game is started, the lights behave normally...then a few games later, the flickering occurs again.
I tried to re-seed all the connectors, but that didn't resolve it. I am hesitant to touch any other connectors until I can isolate which ones might be the cause - I don't want to cause other problems in the process.
Anyone familiar with Gottlieb System 8A, and can suggest which specific connectors/boards might be the culprit? Thanks!