Quoted from JookyDFW:I recently had an issue where my AC/DC Premium was stuck "Locating Pinballs" whenever I tried to start a new game. I couldn't figure out what was going on and tried some of the basic stuff reseating connections, etc. and had no luck. So I started by removing the top cover for the ball trough so I could get access to some of the switches and that's when I discovered the issue.
A lamp under the TNT toy popped out of it's socket and ended up at the head of the trough. I have no idea how I didn't see it on the playfield, it must have been a good play. It displaced the first ball enough to where the sensor didn't detect it.
Yup. Had the same thing happen on a Metallica premium and XMLE. LED popped out and a well waxed playfield it will shoot straight down the middle faster than you can see it. I use glue dots to hold them in now.