I recently traded for a 1987 Space Station pinball machine that needed some work. The 3 bank drop target didn't work, the tilts were disconnected (well, sort of), and the left and right flippers weren't registering to do the letters. I have since fixed all those issues but when I put the playfield back into place, it keeps coming up with a pinball missing code. I looked at the switch matrix and it is showing me that column 2 is not working. These are the playfield tilt, the three trough switches, the outhole switch, and the three mini-playfield switches. I tracked the green and red wire that connects all of these and they all have continuity, even from the CPU All the switched tested good when I hooked up the VOM. The only weird thing was that the resistor (?) on the outhole switch didn't give me continuity.
I tried testing with the power on to everything and they all tested that they had at least some power to them.
Does anyone have any idea what I am missing? I know this is something really stupid at this point seeing as the machine worked yesterday.
Anyway, thanks in advance