Not rooted and stock rom yet every time I go to update (from .7) it turns off, gives me a red exclamation mark and triangle and just restarts. Tried charging it to full and keeping plugged it with no luck.
I tried to flash stock recovery to my HTC One M7 phone (rooted, HAD TWRP recovery, s-on).
after my attempt, now phone restarts, and is stuck on the black screen with red triangle and exclamation mark in it. by pressing and holding power button, i restarted the phone. It restarted normally, and booted just fine.