Originally Posted by dreadnatty08
Yeah, that's basically a hardware issue. I'd definitely exchange it for a new one.
although it would appear to be a hardware issue, i've read multiple reports stating that this happened after rooting, and return to stock corrected the problem. unfortunately i don't remember which forum(s) i saw this, but had to be one of these: Droidforums, XDA or RootzWiki.
EDIT: here's one