I'm trying to upgrade the f/w in my Phantom 3 Pro, and getting the D-D-D-D with red/green LED's on the gimbal, followed by a constant Deeeeeeeeeeeee Sound and a solid red gimbal LED.
Also consistently getting something like this:
[00618560]Firmware upgrading[5]...
[00621130][19 00] Firmware upgrade start...
[00733252][19 00] Firmware upgrade finish failed (step = 3, err = 0xaa).
[00763321]Done.
I've tried 3 different SD cards, formatting each in the Phantom, FAT32 under Windows, FAT and ExFAT in Mac OS 10.10.4, extracted the zip file in the native Windows app, using WinZip, using WinRAR, used the native Mac OS program, downloaded clean files more than a dozen times, and still I get the Deeeeeeeeeeeeee and solid red gimbal LED after maybe 10 minutes of the DDDD sound...every time.
I'm currently running 1.1.9, and can't upgrade to 1.2.6 OR 1.3.2
There's gotta be some way to hard reset this thing, no?
Help!?!?