Battery Icon with question mark (?)
My HP touchpad is out of warranty. When I try to power it on it shows a battery icon with question mark in it. When it is connected to a charger the light flashes on the center button. I have tried all solutions posted on the web, with different button combinations, leaving it on charge for more than a day, using different cables, trying to leave it connected to a computer, etc. Everything brings back the battery icon with question mark and cannot do anything more.
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