Can't start neither power off my Anafi

[gbigot]

I plug my battery (fully charged) : green leds are on for 5 seconds and off.
No light under my drone and no cam initialization.
When I'm trying to switch off : impossible. I need to remove battery.
I tried to reset battery but no red lights after 8 nor 15 seconds pressing button : I need also to remove battery

 

[Dirk_ANAFI]

I plug my battery (fully charged) : green leds are on for 5 seconds and off.
No light under my drone and no cam initialization.
When I'm trying to switch off : impossible. I need to remove battery.
I tried to reset battery but no red lights after 8 nor 15 seconds pressing button : I need also to remove battery

Two things to try:
1. Don't press the button too long. Below 1s.
2. Have a close look at the battery plug of Anafi. Any pins bent?