I have the same problem with "no transmission signal". It appeared very recently. I use a Phantom 3 and have an iPhone 6+. This is my communication with the DJI support: Dear friends at DJI, There is a problem with the transmission from the camera. It says "No image transmission signal". I see that this apparently is a common problem.
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The Phantom 4 Advanced and Pro are the clear winners for flight time while the Phantom 3 Advanced and Pro lag behind at 23 minutes. As for top speed, the Phantom 4 range is 9.2miles faster than the Phantom 3 range. Overall the Phantom 4 range wins out in all three areas. Model. Max Flight Range.
So this seems to be the solution with new sd cards create 2 new folders within the SD called DCIM and inside that 100 MEDIA. If that still dose not work then try copying an old video previously captured but the P3S then put the sd card in the drone. Hope this helps anyone in future with this problem.The two-stick flight system is very intuitive. Phantom 3 Professional is extremely stable in the air. brilliantly easy to fly higher and further. The battery seems very good quality. It is good for a professional to start with. fairly good camera. speed and battery life. excellent drone with a fantastic camera. 711. Location. Oregon, USA. Feb 18, 2017. #3. DJI Phantom 3 camera wiring diagram - RC Groups. id read the rc groups thread for detailed, here's some [ics from it grey one on top in middle. flyflydrones.com. linesix and.