WOW - crazy how non-existent the quality control is at Stern that almost everyone has the same issues. After spending an entire day on these maybe I can help some people with theirs.....
- Manual plunger shoots ball at upper left flipper.
FIX: Unscrewed manual plunger and moved to the right which centered the plunger. Your direction may vary.
- Auto plunger shoots ball at upper flipper.
FIX: I tried all sorts of leveling, had the back legs as high as they go, etc. Nothing worked. I unscrewed the screw holding the shooter lane ball guide in place (under the plastic) got plyers and bent the curve of the shooter lane further left (use a cloth with the plyers so you don't scratch the ball guide), and then re-screwed it. You could try simply unscrewing, forcing it left and then re-screwing, but I doubt this will hold up over time.
- Clarvoyant/Mummy newton balls register on flipper press/pop bumper hits.
FIX: This is just an awful, awful design. A 2" hex bolt is screwed into a pinball, that connects to a pop bumper skirt. The hex bolt is likely not tight on your machine, either due to poor assembly or because Stern actually thought it could be used as an "adjustment screw". Except that every hit to the newton ball loosens the hex bolt, which forces the switch closed, and the ball stops registering. The -only- permanent solution is to fully tighten the bolt, Loctite it so it never unscrews, and then carefully adjust the switch gap to about half a millimeter. Seriously though Stern, WTF with this design.
- Grime on many metal pieces.
FIX: I have no idea how this happens, but my sarchophogus and left inlane ball guide have this black grime crap on the edges. Had to clean it off with a Q-tip and alcohol. Checks yours.
- Top left pop bumper has no light.
FIX: Well actually it does but they used a flasher there for some reason. Another odd design choice. So the other two pops have a normal pop light, and this one has only a flasher. Makes OCD people think either one of the pop lights is out, or two of the pop flashers are out.