Have the Luci Vault. The Fire button works to launch the ball, but does not for the Cannon. The machine keeps telling me to "use the fire button next time", even though I pushed it as the Cannon swings out. The ball does fire from the Cannon.

Don't think so. I have not changed any. I assume there is an easy way to set it back to factory.

I did have the machine apart installing plastic protectors.

There is a roll over switch that is broken on the left ball return. Came that way. I think the cannon sheared off the switch terminal at Stern. Stern sent me a replacement switch, but they sent the left switch instead of the right. Will call them again on Monday.

Anyone have any ideas?

Switches are all working, except for the broken roll over R ball return. The cannon fires when you push the button, the machine just says “Use the fire button next time”. Is it somehow related to the broken switch?

Cleaned the optical for the cannon swing per a pinside member’s suggestion. Works like a champ now. You guys are awesome.