Im new to the SS pins and still reading up on the Sys 9 also but having trouble diagnosing an issue. Pin worked fine when purchased but started having an issue where the drop targets wouldn't score when all 3 were hit, the timer would just run out and reset all 3 targets. Tested each target and the game recognizes each target when dropped by itself. At the same time the game will identify when the first ball sits in the multi ball trap but when the second ball lands there it doesn't and the balls get stuck waiting for multi-ball mode. Around that time I did change out the batteries and reset to factory settings but doubtful that was the cause.

I appreciate any help and advice you all give me.

Thank you
-Newb SS pin guy (Ben)

Will start there, thanks!

Thanks for the help guys! Checked the switches and all were good, wiring also. then went to CPU and ran a test and all was good. From there I checked the switches in diagnostic settings and was again working. Long story short everything was functional except when certain situations happened. While in the back I checked to see if my batteries were dead and they were not. Ended up putting it back together and reset game back to factory settings and it was working again. Could this have been possible bad battery connection? Or was resetting back to factory maybe? Today was a great day to learn more about it and the system 9 pins. Thanks again for the help! Now to hunt down why my column of lights are out!!!