Originally Posted by Dantcc
Yeah, I have. Might just tear the whole body apart and see what's wrong with it.
Don't do it unless you are very very skilled. Try googling for "ifixit htc m8" and see how hard it is to tear open this guy. Yours sounds like an issue eligible for warranty.
Current phone: HTC One (M8)
HTC HD2 (Dec 2010 - Apr 2014; thank you Leo!)
HTC Touch HD (Dec 2008 - Dec 2010)
HTC Touch Cruise (May 2008 - Sep 2008 [stolen])
Previously: Nokia 6630, Nokia 3510