You seem to have triggered a factory reset along the way, but it didn't work. But, you should do one properly just to check. So:
- Plug the device in and charge it for at least an hour.
- Hold the power switch in the off position for 20 seconds.
- Hold the light button down and turn it on.
- When the LED screen changes or the LED flashing changes, release the light button.
If that doesn't work, try again, but you probably need to reimage the SD card. I have sent you a PM with the link.
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