OK so I searched the forum for this issue and the flipper sticking up posts do not seem to be the same as what I am seeing.
The flipper will stick in the up position during gameplay. Infrequently. But seems to do it on the second or third ball, never on the first. If I press the flipper button again it always comes back down. When I turn the power off the flipper goes immediately back down so it appears to be an electrical issue.
But, the flipper button does feel different that the one that is working correctly. feels like it is not as smooth.
So any ideas how to fix? Thanks