No idea what this could signify. It started one day when I was using the button inside the car to open the liftgate, and my wife was trying to open it manually behind the car. Odd coincidence that we were doing this at the same time, but after this event it's completely unresponsive. Just beeps 3 times when I try to use the various buttons to open/close it. The power "latching" part still works. Any ideas?