Are you sure your USB charger is working properly? Have you tried replacing the battery? You might try this trick: Make sure that your Notebook is plugged into the charger and that it is plugged into the power outlet, press the power button and hold it down for 20 seconds, then release the button and wait about one minute, now press the power button again and hold it down for 20 seconds again. Hopefully, this will reset your system.
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