I don't think the display issue is related, but could be if it's poor connectors for all of them.
Obviously want to check/test the leaf switch at that hole, but symptoms suggest that's not it.
Left eject hole (I think that's what you mean, unless you're mixing up left/right: left side only has one eject, so a little thrown that you're qualifying it with "upper") is in the white-green row, I'd trace that carefully checking continuity.
I'd carefully check the coin door too: having accidental ground there can do weird stuff like that, and center coin switch is in that row. The fact that motion triggers spontaneous switches/scoring makes me suspicious something might be getting grounded.