I have this weird problem that just kinda popped up for nowhere. I was recently having problems with a weak lower left flipper. All the other flipper were strong and acting properly. The lower left flipper seemed to loses power as the game went on. I clean both flipper switch opto sensors and the problem seems to be fixed. However, now the little upper right flipper won't stay engaged?? When I engage the flipper button on the right side, the upper flipper flips really quickly twice then falls down. However, The lower right flipper stays engaged. What do you guys think is causing this. Thanks for the help!

Thanks Phatchit! I will take a look at it tonight.

Update: Everything was fine with the coil. The orange (Holding power) wire had become disconnected from the coil so I soldered it back on and everything is working fine.