Great info in this string. I am using the diagrams to track my light issues with a WOZ RR. The odd thing with my machine is all lights are one position off on the single LED test.
For example, the test for Rainbo(w) lights “o”, Rainb(o)w lights “b” and so forth. Everything is one position off. I am tracking the wires hoping it is an easy fix. Just curious if anyone has witnessed this.
Update - using the diagrams, one board was skipped, causing the sequence to be off. Easy fix.