Phantom 2 vision worked great for the first four days. Today it will not start at all or seemingly acknowledge the battery. If the start button is pressed once only one green light comes on. Pressed twice and all four will come on and then it will go to one green light again and it will stay that way until it shuts all lights off in about 1 minute. The phantom will not attempt to start at all. Can't get anything from the usb since it has no power, Thoughts?