Having an issue with one of my ST:TNG flippers, the lower right sticks up during play. Sometimes. I figured it's mechanical but with power off it is nice and free, no issues that I can see. In test mode it all seems to be fine, i.e. I can't bring the problem on. The only thing I haven't tried is waiting for the machine to warm up before running the tests, which may demonstrate the problem better. The buttons themselves are quite free and don't stick.
In the meantime I have a couple of questions:
In the "hold" test, both lower flippers sort of wiggle a bit but that's it. The upper right moves out to fully open (not instantly like you've hit the flipper button, but maybe two seconds). The lower right barely moves at all. So I'm guessing the lower coils need replacing? I'm thinking of getting some rebuild kits to do the lot.
The plastic opto interruptors or whatever they're called that actuate with the flipper buttons - the left one has a copper thing over it that acts like a return spring, while the right one doesn't. Should it?
Any advice much appreciated.