Hello!
I joined this forum back in May 2020 when I bought a Phantom Pro 3 off of facebook marketplace and was experiencing weird issues with the remote. I received some great advice to send the remote directly to DJI and they replaced it with a brand new one for $90. I've been flying ever...
I (somewhat recklessly in hindsight) purchased a used Phantom 3 Professional/controller/batteries secondhand over facebook marketplace. The previous owner demonstrated about ~5 minutes of flight to show that everything worked. However, when I went to fly the drone, the controller would power on...