Re: 9780 Won't Turn On - Momentary Red Light When Charging
Have you let the battery run down past 20% more than a few times? If so, you may have damaged the battery.
You can try removing the battery, placing the device on a wall charger and then insert the battery and see if it will charge. Typically, you need to get past a certain point, around 10-15% charge before the device will turn on. That might take an hour or two.
If that fails, try a new OEM battery made for your specific model.
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