I have two GL300C Controllers. They look as if they are identical. All numbers match. The first controller only charges to the third light. I am trying to link the controller that charges all the way to a Phantom P4. The controller links and I can start the motors and tilt the gimble. However, the camera is not showing an image. The controller beeps constantly and the light on the controller is orange. Any help, before I send it in for repair will be much appreciated.