I'm having some switch issues with my Shadow. I've switched out the cabinet and security board with known working boards. Sometimes these 4 switches will work, but then will stop working. I'm thinking I might have a wiring issue since it doesn't seem to be board related. I've circled the switches that aren't working. I'm at a loss and not sure where to look. Maybe these aren't getting grounded properly? Any help would be appreciated. Thanks!

shadow switch matrix (resized).png

Will do. Thank you!

I checked continuity between J212-1 and J3-1. Everything checks out. All of the switches have continuity back to the coin door interface board too. Not sure where to go from here. Maybe ground issue?

Just figured it out! Connector J212 was super corroded. Cleaned it up and got the cabinet switches working for the most part. Will need to put a new connector on. Thank you zaza! You are awesome!