my nexus 5 does not reboot

[AC Question]

i tried all steps suggested in this forum but failed.i reached upto the stage of "image of robot with red exclamation mark" but after that i could not do any thing.

 

[belodion]

Welcome. I'll request that this be moved to the Nexus 5 forum.

 

[Rukbat]

How about turning it off for a few minutes, then turning it on? (And have you dont anything to the phone? Like trying to root it?)