Hi I have 2 phantom pro's one is working perfectly but the other has become a nightmare, I just have no video signal at all, when I turn the drone on and wait for at least 30 minutes it still wont load a video signal. the remote says connected to the bird but that's about it. I have tried to get signal with both devices HTC one & NVidia shield tablet, on my other phantom pro' both devices work perfectly . I have tried re linking remote plus latest firmware for bird & remote done all the Imu & gimbal calibrations, any ideas? would be grateful, cheers.