When my screen locks, why can't my phone be woken back up?

[AC Question]

When my screen locks, my phone cannot be woken back up!

Everytime my Nexus5 screen locks, my phone cannot be unlocked, only restarted. I have had the phone for about a month, and this changed sometime in the midddle of the night last night. (I put it on the charger and now it is not functioning properly). Can someone please help??

 

[Golfdriver97]

Re: When my screen locks, my phone cannot be woken back up!

Welcome to Android Central. I think the first thing to try is a reset. Back anything up before doing so, make sure contacts are synced to Google servers, etc. and then go with the reset.