Samsung Galaxy S3 — HELP PLEASE!

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gcc
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Jun 11, 2015, 4:15:07 AM via Website

My phone is an AT&T SGH-I747 VERSION. I had it rooted to change the language to chinese for my dad. ( I don't remember what version or program I used because I followed a youtube video and it was a while ago). One day the phone shut down itself and after that I can turn on the phone anymore. I tried hard reset like pressing the home and the power button to erase the data or restart it, nothing happened. When the phone is charged, there is a battery screen on and then it goes back to the black screen. No samsung logo or anything I can do to make it turn on again. PLEASE HELP ME, THANKS!

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