The solution above was confusing for me, so I would like to add what worked for me.
1. Press and hold the Power button and the down volume button until the factory reset screen appears (DO NOT FACTORY RESET!!)
a. 4 options will be available Normal Boot, Factory Reset, Safe mode, shutdown
2. While performing step 1, plug phone into the charger.
3. Leave phone to charge with the factory reset screen up. Don't select an option yet.
4. After about 15 min, select option 1 (Normal Boot).
5. Continue charging phone to 100%.
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