I haven’t been using my HP TouchPad in the past few weeks. So much so, that the power had completely drained. When I returned this afternoon, it wouldn’t power on despite having charged for nearly eight hours.
From this state, it’s easy to fix.
holding the power and center button for 15 seconds or until HP logo appears
It worked for me this time, but then again, at only $99 I don’t exactly expect too much.