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You can make a full charge : one night. After, make a hard reset with the button in the back of the M92.
Or, just to know if the device is working as expected :
* turn off;
* wait few minutes:
* turn on;
* wait few minutes;
* take a snapshot : maintain de minus button used fot the volume few seconds:
* connect you device to your computer, wait few seconds - 5 for the M92, but how much for the computer ?
* press the joystick;
* from your computer, go to the "snapshot" directory and try to find a snapshot.
I suppose that if you can find a valid picture, the device is working but only the screen has a problem.
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