Looking for some help. Just picked up a very nice Joker that is having some chime issues. Chimes are sketchy. All three work on start up. One works all the time during play, other one here and there and 3rd no dice. During coil test 2 of the 3 test fine, I believe the 1000 chime will not work which is weird as they all work on start up. Tried new board and No change. Any thoughts on where to start?

Good call. I took it for granted that the previous owner said they checked them but when I took it apart I found the foam stop for the chime plungers torn and they were falling down too far and getting stuck in the glue. Replaced the foam and working fine. Thanks for the tip.