I have two crossed columns on my Pinbot, 3 & 4. Each lamp on column 3 is coming on when the corresponding lamp on 4 is lit and vice versa, e.g. Uranus and Yellow 2 both coming on when either is lit.
I measured IJ7 and got these values:
So I think that means that something is wrong on the board, but I just don't know how to find out what it is. Help!