I got my O3 3 days ago, the unit is updated via USB to the latest firmware 01.02.0000

when I remove the USB and connect the AIR unit to the FC, the unit is not powered up even if I press the small pair switch
I also tried powering it from the FC 9V BEC and no luck, even with a 3S battery directly and no luck

am I missing on something here ?

i can still see it when connecting via USB

check wiring looking at the doc of your FC. on some FC, dji connectors wiring is not standard

What flight controller do you have?

dimitri666 Posted at 1-9 07:04
check wiring looking at the doc of your FC. on some FC, dji connectors wiring is not standard

thanks, dear, I checked my 2nd o3 unit on the same FC and it is working

looks like my first O3 unit is faulty

Pete Watson Posted at 1-13 07:30
What flight controller do you have?

am using the MAMBA MK4 H743 V2 along with 55A/65A 128K Flight Control