Dead 920?!

[MARKjotep]

This is so ill-fated.
Hopefully my 920 won't experience this.

However since it is not responding to any soft/hard reset, you might want to try removing the case or housing of your 920? then unplug the battery.

 

[Vitor Ferreira]

Swap battery may work

 

[JamesPTao]

Swap battery may work

I believe this man is right if nothing else works then the battery is likely dead beyond dead.