Quoted from kklank:1. Switches 52 and 53 in switch test are coming up. I think these are the two optos underneath the space station. I took the space station off and I cleaned or dusted the optos but that didn't seem to do anything? What else do you do to optos?
As Swainer80 says, 52 and 53 are the optos under the station that tell the machine the position of the space station. How does the game behave during play? Does the station rotate and stop in the appropriate places? I'm not with my game but from memory, when the station is in either "home" position, neither 52 or 53 should be closed. If the station behaves itself during play, it may be that you did a coil test first, which would've rotated the station off "home". If it doesn't behave itself, further investigation is needed. One of the first things I'd check is that the other switches in that column register. It seem to be fairly common for the column to fail as it includes lane change switches stacked on the flipper EOS.