If any of you have had the firmware fail and not start up again, or if you want to force install a lower firmware, give this a shot.  In the video I did it in one take so you can see the Phantom 3 started up with current firmware, I then shut off the drone. Hold in the bind button located on the VPS unit and turn the drone back on while holding the button.  Wait until the start up beeps then release the button.  This is how to force install or reinstall firmware on the DJI Phantom 3 Advanced or Professional. This may not fix all problems with an update if there is a different underlying problem.