nexus 5 screen lock problem

[AC Question]

this appear suddenly today, when i unlock my phone the lock screen runs normally, i can control notification bar remove notifications turn on and off wifi etc, nut when i try to unlock it to go to my home screen , the screen turns off. i tried every thing i could even factory reser non of it is working. please help.

 

[belodion]

Have you tried Safe Mode, to test for third-party app trouble?

 

[B. Diddy]

Welcome to Android Central! Does the screen turn off only after entering the correct password/PIN? Or does it turn off while you're trying to enter the password?