I Have Same Problem...
I have the Phantom 3 Pro and
I installed Firmware P3P V01.11.0020 on the Drone and now I started having several problems.
I thought the New Update Firmware. For Controller 1.5.80 I was going to work .. And no .. Now the controller just beeps and flashes red light and it sounds all the time it connects but with bad Video .. and it does not let me fly it saying that I need to update the firmware in the App dji Go ... What can I do?