Hi, I'm Nathan.Sorry to hear that you're having trouble with this but I'll do my best to help you.
This symptom can indicate several possible issues: an internal hardware failure, a low/faulty battery, or just a simple memory/firmware glitch.
The first step here will be to attempt to reboot the nook. This is done by pressing/sliding and holding the power button for 30+ seconds, then release. Give the nook about a minute to start back up, and let me know if the problem persists, we can then try some further steps.
Note, you may need to repeat this process 4-5 times for the reset to take effect.
Thank you for trying,
unfortunately that does tend to indicate a hardware failure which is common as these age.
If the nook still isn’t working properly, the next step will be a deeper level reset. If you have not charged the nook recently or know that it is at least half full, then you should charge the battery for at least a few hours before proceeding further. Then plug the nook into computer via usb cable, then press and hold power button for 60+ seconds, and release. The kindle will take 3-5 minutes to reload it's internal firmware. If it doesn't turn back on by itself, press power once to turn it on.
Because that is part of the reset process and prompts the nook to reload its internal firmware, it is a restore process of sorts.
Don't worry about the computer, you only need to focus on the nook
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