When plugged into a 220v and turned switch on, the switch green lamp flashes once and after thar nothing happens. Tried a few times, changed the 220v socket, and nothing happened.

Is there another LED that lights up? Red Yellow. Is this the first use?.... if not, you can contact your DJI dealer right away.

Hi, there.
We are sorry for the late reply.
May we know if your problem is resolved now?
If not, could you please send us a related video so that we can confirm this problem asap?
Thank you.