I have a row of switches (rownot working on my Addams family. I am somewhat familiar with electrical trouble shooting, and I know how to use a multimeter, and I get the switch matrix concept.
I inspected each switch on the row, and I don’t see any problems. The row (white/gray wire) tests good.
How do I test if the problem is on the cpu board ? I’ve seen people jumper pins on the cpu board, but I didn’t catch exactly how to do it.
Any other tips ?