Why did my phone went black?

[Windows Central Question]

I was updating my phone with Windows Phone 8.1 and after rebooting the phone went black except for the lock screen. I already tried shutting it down, removing the battery, still the same result.

 

[Montpbm]

Do a hard reset, it should work

 

[HoseLeyo]

Will it delete all the files in the phone?

 

[HoseLeyo]

will it delete all the files? If os, is there a possibility that the files would be recovered?

 

[HoseLeyo]

Are there any other way to fix my phone? (other than hard reset?)