What does what looks like a lightning bolt and a gear on my Microsoft phone mean?

[Windows Central Question]

It's on the charger. Buttons do nothing

 

[Martin Oscar Caballero Sartor]

Try pressing and holding volume down and power buttons for some seconds until it vibrates.

http://forums.windowscentral.com/htc-8x/207667-screen-frozen-lightning-bolt-settings-icon.html