Hello!!! I have a problem With my dji phantom 3 pro. When i turn og the controller and the drone. The controller light is green, like it's conected to the drone. But.. The drone is blining yellow like its not conected. I Can stear the gimbal. But i Can not start the motors. An when i try reconecting it. It hapends again and again... And the liltle one light on the left side of the drone blinks, red and green.

Another problem i have is test the rc. When i conect the cable to my Phone. And gies to the app. I cant do enything. Line the rc isent conected to the Phone...

Sounds like you may need to calibrate compass or imu.  Have you read the manual?