My Stern Star Trek is HUO and has had relatively low plays. I've had it over a year and just recently the upper flipper started to stick in the up position on occasion. It sometime pops down after a few seconds but sometimes stays up longer. It does not happen with every flip but fairly often. When I inspect the flipper with the power off and move it manually it moves very freely, with nothing binding at all and I can't get it to stick in the coil.

My question is whether this could be an issue with the coil or something other than a simple mechanical issue. What should I test to determine the issue?

Thanks!

Thanks LTG - great idea. The test proved it is indeed mechanical. Time to dig in and figure it out!