I'm hoping you guys can help as I have searched everywhere and cannot find anything on this. 2 weeks ago I purchased a Phantom 2 Vision + from someone. He tested it in front of me and it worked great. I take it home and immediately it loses connection with my controller literally 50 feet away and the phantom flashes yellow and comes back to me. I have performed every single calibration known to man. I have taken apart the controller and it looks fine. New batteries in controller. The lever on the back that controls the camera doesn't seem to work either. I'm so frustrated. Has anyone had this kind of trouble or any suggestions? No power lines or cell towers. Flown it different places with same results. Thanks so much!