Hey all -need your help with my Metallica Pro.

I just turned it on to play a game and noticed that one of the pop bumpers (top left) is randomly going off during the game (causing points to score). There doesn't seem to be any pattern to it, but it mainly seems to coincide with a ball hitting a bumper, flipper shot, or some other vibration.

Any idea on a cause and how to fix this? I've had this game for about 5 months and it's played flawlessly until just now. Thanks in advance!

I got under the hood tonight to look at the pop bumper switches. All three looked the same and I couldn't really tell what to fiddle with (meaning I couldn't see any noticeable difference with the one causing problems). The strange thing is that while the glass was removed, I played a game and no more random popping, so I thought I must have jiggled something right. I put the glass back on, start a game, and boom -same random popping from that one bumper. UGH...

Thanks guys. Got under the hood again and made the adjustment. Man, that's a small sliver of space that has to be there for it to work properly. Perhaps half a millimeter? I sincerely appreciate the help. Much love to the fellow Pinsiders!