I recently replaced the globes on my IJ and noticed most of the top row of lighting on the backbox wasn't lighting up. Didn't think much about it and I was pretty sure it had been like that for a while (10+ years). I finally decided to track it down and follow some wiring to see where the loose wire was. I found that the J120 connector was blackened on pins 9 & 10 and couldn't be removed. With a little gentle persuasion (a vice-grip) I carefully pulled it out as 2 pieces (see below). My question is does anyone know how to test J120, specifically pins 10 & 11 to see if they are working - maybe some sort of general connectivity test with a multimeter, before I wire this up again.
I've got no idea when/how/why/where this happened and the machine plays fine, apart from the fact that the flippers, following the change-over to LEDs, have become too strong, which is another question.
Additionally, does anyone know who has the 11 pin edge connector?