I finally got my WD running but I've got a problem I can't figure out.
Most of the time, everything works as it should and I can play several games with no problems. Once in a while, the ball goes into the "Sewer" and never comes out. The game goes into ball search but it looks like that popper is never fired. No amount of nudging or even tilting solves the problem, so the game is unusable.
If I go into Solenoid Test and fire coil #18, the ball pops right out -- no problem. Switch test shows the opto working as expected.
Anyone else with this problem or with suggestions?