Just recently our Samsung RF267AEBP began cycling through ice, crushed, and water on its own. Each time there will be a chime. It's as if someone is pressing the buttons, but it's doing it on it's own. When I try to manually switch between modes it will lock and none of the buttons will work. Everything else works normally, as in cooling and freezing. Do I need to get a new motherboard for the fridge? Thanks.