How to fix the occasional - but annoying beep-beep-beep when you start up your DJI Mavic Air. It's not a fault and seems to be random. Steps:
1) Power on controller - if it beeps - here's what you do,
2) Power on the drone and connect as normal (still beeping),
3) Enter aircraft via wired connection (beep-beep-beep),
4) Go to 'Remote Controller Calibration' via DJI Go4 App,
5) Power off aircraft as instructed (still beeping),
6) Leaving remote controller on (still beeping...), power drone back on,
7) Go to 'Remote Controller Calibration' again (you're almost there),
8) Go to 'Calibrate' then 'Start', blessed silence :-)
9) Go fly and hassle some Karen's - legally of course!
