Just bought a phantom 3 pro. I have tried three different devices samsung s7, s6, and tab4. Never able to get video feed jus a black screen. I tried updating firm ware and when I do I get a loud continuous beep. When I take out the chip and check the file txt it says fail but when I turn everything on it says all the firmware are the most up to date ones. The only thing is the radio signal is poor. I have tried changing the usb connection but constantly goes back to charging mode. Please any help.