Ok so I have been working on and playing my first pin and EM for the past couple months. Worked out all the obvious problems (Thanks Pinside!) and have replaced most worn parts except the bumpers they still work good but will eventually as I want to replace the plastics.

So on to the problems. Extremely intermittent so I don’t yet have much info. Was hoping for a “maybe look here” or “sounds like” suggestion. The game is Gottlieb Crescendo. The first problem happens more often. It’s when I quickly hit two drop targets the second sometimes will fail to register. I thought it might be one specific target but last night another one did it. These are new drop targets that drop and pop flawlessly after a bit of tuning. At the time I set the switches and all worked well but have not inspected recently. I also cleaned contacts and removed the gummy grease where the switch activating metal to metal contact occurs as the target slides down but have not replaced with anything. Cant find product or enough solid recommendation to add lube to do so I’d like some input on that too.

Next issue rarely occurs but when it does you can’t miss it. When the ball ends the very first thing to happen is a 1, 10, and 100 is added to my score with the corresponding chimes going off before the end of ball switch/relay cycle occurs. I’d think this one would be easy to figure out but due to the rare occurrence perhaps not.

I love a good EM mystery and my last one took me a month but did not give up. Anyone who can give me a little direction while I head down this road I would be very thankful and will plug away until it is solved!

That might be it then. It is when the 1st drop is still scoring and chiming away. Well that was an easy fix... lol! Thanks for the info.