My Nexus 5 (5.0, stock, rooted) won't boot, despite being on 70% charge when I last checked. What can I do? When plugged in, it kept repeating the Google logo, shutting off, and repeating. I unplugged, and now it won't turn on at all, no matter what combination of power and volume buttons I try (even recovery mode-- trust me, I've tried it all). I've been running Lollipop for over a week now with no hitches, and this came out of nowhere. Any suggestions to get me out of this?
It's probably soft-bricked. Use a program called Nexus Root Toolkit to reinstall the stock ROM: http://www.wugfresh.com/nrt/