Hey guys, I need some help please. I just got through removing everything on the playfield to clean and wax. Now I got it all back together, I get an error that the slam tilt is closed. I can exit out of that error and I get more errors that I need to check switches 81,82,83,84,85.
I found 3 tilt switches that seems to be working correctly. Where do I start to fix this error?

I disconnected the Slam tilt switch and that error when away. In the switch test I found that switch 24 (Always closed) was also messed up. Not sure what that switch does.

The 5 switch errors are all related to the Supercharger and I found this in the manual " The - First, Second. Third - opto on the Supercharger is stuck open. The game software disables the corresponding magnet until the opto is fixed." I'm hoping that I didn't get anything wet when I was cleaning it! If it is the Supercharger, How do I test that?

Now I also got a shifter error.

So, using Pintech UNIVERSAL 64 Switch Matrix Tester I found that column 8 tested good on the MPU side. But I found that column 3 does not register. So I must assume that this is an MPU problem.

Delete

Delete

Sorry I hijacked the wrong thread.

-What led you to think that it's the boards fault? And which board?