Hi there, I just received my phantom 2 yesterday. Took it out for the first time and found that after what seems to be a normal start up, the rear lights slowly blink yellow. They don't change from yellow at all. From the manual this means it's ready to fly without gps, which I don't want to have to do. It certainly responds by blinking yellow fast if I turn off the controller. But that's it, turn the controller back on, and it goes right back to slow blinking yellow lights. Please help! Thank you!!