Hi guys, still trying to get the right sling to work. It fires in test, but not in play. I think I got a switch problem. On the switch test they all show open. When I physically close the switches on that matrix row they remain open in the switch test. All the switches test fine with the ohm meter. I then tested the wires back to their respected plugs and pins and saw no issues. Not sure where to go from here.

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Thank you wayout440 for your response. I really am not sure if it ever worked right. I do remember it had a little action at one point but almost like a stray voltage kickback. I thought it was a coil problem so I changed the coil. When that didn't do anything I switched out the CPU board to the old one I had. Anyway, did the jumpers and jumped CJ4-6 to cj4-12 and it registered both right and left sling. Then I did Cj4-6 to cj4-13 and it said rocket.

Thanks again, I take it that I was supposed to get both left and right slings switches to show closed when I jumped the pins. I already ohmed out the wires so I guess its the plug. Your help is greatly appreciated!

Well, I now have fresh coils, some extra chips, and some lessons well learned on my first ever pinball game. LOL, but I finally got everything working. It was the connectors, not the board. Thanks to everyone for your very valuable input.
I guess the next step in the learning curve is changing the connectors. I went on a couple of pinball parts stores looking for them but they don't seem to have the sizes mine requires. They are listed as .025 sq. pins and .045 sq. pins. Any ideas where to get the female connectors?
Thanks again!