'''Cesar Ramos''' the looping can be an issue with the battery/power. Check to make sure that the battery is still fully seated and that it makes proper contact.
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'''Cesar Ramos''' the looping can be an issue with the battery/power. Check to make sure that the battery is still fully seated and that it makes proper contact and that the battery flex is not tore. You will have to do a bit of disassembly for that. In your phone case and if this still the original battery, I would replace it at the same time. https://www.ifixit.com/Guide/HTC+One+M8+Battery+Replacement/41650
'''Cesar Ramos''' the looping can be an issue with the battery/power. Check to make sure that the battery is still fully seated and that it makes proper contact.