Quoted from ExSquid:
Back to having the issue where the right flipper scores points when the ball isnt in play. VERY frustrating. Only happens once in a while and cant figure it out. Switch test doesnt show anything.
It can happen with any machine with a switch that is set to a hair trigger or poorly attached to the machine such that it shakes on it's mounting. Newtons/captives/spinners/gates and other non-standard switches are a common culprit as they tend to be highly sensitive and whatever makes them unique tends to be heavy like a weight on a lever, but even a simple rollover could do it. It could even be a stray wire strand where the wires attach to the switch that brushes the other contact.
Whatever switch it is, it's either loose, malfunctioning or adjusted wrong. It can be triggered by anything that shakes the machine just the right way, but easy to go unnoticed in the chaos of a game. It's easy to notice with the flippers on maiden because you hit them to select a song or set up a skill shot while the rest of the machine is at rest.
Seen it specifically with the newton orb on the Premium, as well as just the normal target orb on the pro. The only way we figured out what switch it was on the pro was because it would award the mystery award if one was available. If you're not getting that, it might be another switch.
If switch test isn't finding anything for you, focus your search on likely culprits. Finger test them for a hair trigger or they are loosely mounted. You can narrow it down by noting the amount of points awarded and any other indicators like lights/callouts/counters. For example, look at the power pyramid counters before an after to see if one changed. If it's really nasty, you could even dump all the audits to usb, trigger it once, dump them again and then compare each value line by line and see exactly what internal counters changed.