Quoted from aerobert:
My game have some issue with the flippers. Sometimes when the ball drops on one it "ghost flips" and sends the ball away when I have the flipper up. And sometimes the flipper just drops when the balls hits it. What is causing this? I checked the end of stroke switches but couldn't exactly see anything.
Here are pics of the left and right flippers. I only noticed that the left switch had an extra metal bracket or something that wasn't present on the right one.
Could it be that those rubber things are a bit worn?
I am not an expert at all, but make sure that the EOS are closed solid and just opens at the end of stroke. DE EOS are "normally closed" in opposite to Bally/Williams which is "normally open" other than that you might have bad hold voltage (should be around 9v), could be bad conections, bad ground, bad fuse holder, bad flipper board.
Other people may have more detailed suggestions. But there's my bet.
good luck hunting your issues down