So I have a phantom 1 that has been fling flawless until today when i pulled it out to fly it for my buddy, at the end of getting my home position locked it, instead of getting a normal green blink, I get a normal yellow blink. First time it happened, I turned everything off and started everything back up. This time I achieved a normal green blinking light. Flew no problems. Next battery. Started it up. Blinking yellow light. Flew the copter for the duration of the battery and had no problems. Next battery. Same as before. Back and home now, and still can't get it to go green blinky. Anyone know what might be my problem?