Why has my Lumia 920 shutdown and won't turn on?

[Windows Central Question]

my lumia 920 was working good until today when it displayed the message

lumia 920 shutdown. its not starting

 

[RumoredNow]

Re: my lumia 920 was working good until today when it displayed the message

Are we missing something?

What message did it display? What did it tell you?

"Shutting Down" was that it?

Are you on official? Preview for Developers? Windows 10 Insider?

What were you doing when it happened? Could it just be flat battery?

You would need to join the site so you can reply here with more detail. Otherwise I don't see how anyone can know how to assist.