Please follow the steps below to identify the cause of the failure: Connect your device to power. If it shuts down because the battery is completely depleted, the LED indicator stays luminous after connecting to power, indicating it is charging. If the indicator doesn't light up 5 minutes after connecting to power , please check: •If the plug (pin) of charge calbe is properly connected to the device.(Mostly it may deep plus to end ) •If the adapter or power is properly connected. If none of the above steps can identify the cause, the product bought by you may have a functional defect. Please check the warranty page or contact our Customer Service directly.