Don't know if anyone's encountered this, but I had my unit refuse to power up yesterday, no matter what. Wouldn't accept an attempt at charging, either. After a frantic Google search, I tried the suggested "simultaneously hold down the volume UP side of the tab, and move the power slider into the down ("power") position. The suggestion was to hold it this way for 2 minutes. After about a minute, I stopped, removed my fingers and... voila! It lit right up, and it's good as new. It did not appear that I'd allowed it to completely run out of juice as there were full bars showing. Was already exploring my $200+ options for a new one, as I can't live without one of these!