My Lenovo S820 locked in Boot Screen? Help needed... to solve the issue

[praichura]

I am using Lenovo S820 from past 18 Months, The Phone is with Android Kitkat 4.4. 2 Days before suddenly my phone was switched off & when i try to restart the phone it is just showing me Lenovo Logo & Phone is stuck in that screen.

I tried to go in the Boot Menu, But there are no files in Root Folder to recover the phone ... Kindly help How i could solve this issue.....

 

[B. Diddy]

Welcome to Android Central! Is it rooted to begin with?