Samsung Galaxy S3 (SGH-I747M) acts like it's dead. How can I fix it?

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Samsung Galaxy S3 (SGH-I747M) act like his dead

Hello everyone,
I have a Samsung Galaxy S3 (SGH-I747M). I restarted it, but never turn on. The battery was around 70% of his capacity. After trying pushing the power button multiple times, removing sometimes the battery and putting it back, nothing happen... Not even "black but screen on", but black when the phone is off. I plug it, the battery graphic don't appear, I tried a different USB cable... Same result.

After that I made some research, I tried :
- Home + volume down when plug or unplug
- Remove the battery, press the power button for 1 minute, let it rest 5 minutes. Put the battery back and press the power button.
- Let it charge overnight and tried to power up in the morning.

Still nothing... Cold, silent and black screen. Anybody have an idea?
 

Julien Lapointe

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Aug 5, 2015
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Re: Samsung Galaxy S3 (SGH-I747M) act like his dead

Hi, it me who wrote the question.
All this seems good.. but even my computer don't see my device. So, i have no way to perform any recovery...
 

Julien Lapointe

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Aug 5, 2015
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Re: Samsung Galaxy S3 (SGH-I747M) act like his dead

My computer do the sound of a usb device connected. But, it appear no where and don't have access to the phone.
 

Ian Morgan2

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May 27, 2015
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Re: Samsung Galaxy S3 (SGH-I747M) act like his dead

Seems like there's a few things to read here :-
https://www.google.co.uk/search?q=qhsusb_dload&rlz=1CASMAE_enGB648GB648&{google:acceptedSuggestion}oq=QHS&sourceid=chrome&i
 

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