My Addams Family was working without problems for months. Right sling started firing seemingly randomly. I have narrowed it down to the right sling firing when solenoid 1 thru 15 fires. It doesn't happen every time but almost every time.

My switch matrix was a mess when I got the game and replaced U-18, U-20 and U-13 and all was well. Since I installed sockets for those I swapped them out with new chips just in case but still have the problem.

Kind of at a dead end now. Anyone got any ideas?

Thanks very much.

Al

Thank you so very much! Great video and learned a lot from that. That is exactly what my problem was! Switch just a bit too sensitive on the right sling shot. I'm an EE by training so I guess when all you have is a hammer a lot of problems start looking like nails! Here I was looking for a bad chip or other anomaly in the circuit when it was mechanical related. Thanks again for your help and the video was excellent.

Al