I've had that issue several times now where I was horsing around with xposed modules and rebooting and it would just freeze with the screen super dim and the Verizon logo just barely perceptible. Holding power forever did nothing. One thing I found that ALWAYS recovers it for me is holding power and volume UP for about 30 seconds. It hard resets it. Works every time for me.
I was starting to get scared too as I'm coming from The Galaxy s4 and am used to being able to battery pull.
Verizon HTC One (M8)>S-OFF >TWRPv22.214.171.124>ViperOne-v1.8.0>64gb ext SD
2013 NEXUS 7 LTE>MultiRom>CM11
"For what have you really accomplished when you have bested a fool?"
"It is a huge mistake to theorize before one has data. Inevitably, one begins to twist facts to suit theories instead of theories to suit facts."
Verizon Galaxy S4 (SOLD) Verizon Galaxy S3 (SOLD) Verizon Galaxy NEXUS (SOLD)2012 Nexus 7 (SOLD)