How to reset the A1-840fhd Tablet?

Hello, I was using my Tablet this morning when suddenly appears on the screen a warning to update my version of android, I accepted, downloaded and installed, battery was full but it turned off and now it does not turn, I don't know why... It was an official update, I just installed pdf because I bought and have not rooted my Tablet and nothing not incidentally... What can I do?

Contact support technique Acer service

Tags: Acer Tablets

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