I have three Genie minis. Two of the Three units will let me set it to 1080 and then a day or so later its back to 480p and there are no options to change it back. Both of these TV's worked fine with cable and about 3 years ago when I had DirecTV with non-Genie boxes. I have replaced HDMI cables, I've reset the boxes, I have tried different HDMI ports, I have native set to off. I've tried everything I can think of. So now I'm stuck watching 480p in these two rooms. Any help would be greatly appreciated.