the exact same thing happened to me, was surfing a site, took a pause to look up at tv, looked down and i was reading the screen it just went black. tried pressing the turn on button at bottom, then the power button and nothing, rubbed the screen, nothing, i tried the rec to plug into wall outlet for about 10 minutes then pressed the power and turn on button simultaneously, released the power button only and yup, it rebooted itself. not sure what happenned as i still had at least 40% juice in it. just thankful that it came back on, thanks for the tip