Google Nexus 5 :: Phone Is Not Waking But Backlight Comes On

Nexus 5
Version 5.0.1
Not rooted
Not unlocked (IIRC)

Last night, I noticed that my phone didn't seem to be sleeping. I rebooted my phone and it seemed to be working. The next time I tried to check something on it, the screen would not come on after pressing the power button. Pressing and holding the power button, the phone would reboot and I would be able to use my phone normally until it slept/I turned the screen off. Power button does not bring the screen up, but the backlight does come on. Notifications come through, (light included).

I've since factory reset my phone, loaded settings from what was saved before.

-> phone will not wake Factory reset, -> treat as new device, no apps from google play installed -> phone will not wake

This issue for me has just started as of last night, with nothing updated/installed/changed recently. Cycling the power (holding power till it restarts) allows for use of the phone (until it sleeps), power + vol up does nothing different from just power, and power + vol down boots to the bootloader with nothing changed when started from there.

I have looked elsewhere, this doesn't seem to be a common problem, but seems (to me) occurs more with rooted/rom'ed phones and not stock phones. This phone hasn't been either of those. None of the things I've found seem to have any solutions.

Edit: I went through the Google Play store troubleshooting thing for 'Device will not turn on' and now I cannot get anything other than the Google logo upon restart, or the Boot-loader if Vol - and power.