A hard reset is worth a try but it is unlikely to fix the problem, it sounds like a hardware issue.
Here are instructions for a hard reset
Make sure the tablet is OFF.
Press and hold the Volume Up and Power buttons at the same time.
When the Android starts to flash, release the buttons.
Then try to press different hardware buttons until you are given a list of options.
Note: If Volume Up and Power doesn't work, try Volume Down and Power.
I’m happy to help further over the phone at
https://www.6ya.com/expert/jonathan_828b54f422cbefdd
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