a dumb question.
does the factory manual have a simple trouble shooting section with that error on there with the manufacturers answer as to what it is/needs replacing ?
That would be nice but doesn't exist in Wpc manuals I've seen.
Maybe williams had something more substantial for Wpc series..
I'm guessing for operators and repair techs it was a case of replacing boards to keep the machines making money and hardcore repairs on the boards were done back in the workshops..