Plug charger back into your device and let it charge for about ten minutes, Then hold down the power button until either the battery show on the screen or until it power back up. If the battery displays on the black screen that means your device doesn't have enough charge to power up.
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If the problem is still not resolved refer to link below.
Plug charger back into your device and let it charge for about ten minutes, Then hold down the power button until either the battery show on the screen or until it power back up. If the battery displays on the black screen that means your device doesn't have enough charge to power up.