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Samsung 8.4 in. Galaxy Tab Pro - 16GB SM-T320NZKAXAR Black Questions & Answers
How to remove demo video from a Samsung Galaxy Tab Pro 8.4
You will have to do a factory data reset! I found when I bought this it kept playing a demo video every time I tried to close the screen. Go to settings, then general, then backup and reset. Turn off backup my data and automatic restore. Then touch on Factory Data Reset. You will have to agree to everything after it restarts but you can change these settings after you have reset your account info. This worked for me. You will loose your pics, data, and other things you have put on this device but if you transfer those dates to a SD card you can reinstall after resetting the tablet. This is the only way I found to get rid of the annoying demo video that comes with this thing.
Tablet problems with touch of the screen
let's start with the basics first in order to solve your tablet issue. Once we go that, we can move forward as necessary.
I would recommend performing an antivirus scan on your device. You can search for "avast" or "malwarbytes" in your app store to get started.
If that doesn't work, then you can perform a factory reset as described by Samsung here:
https://www.samsung.com/us/support/answer/ANS00062842/ . You'll be advised to back up your files before performing the factory reset.
Please let me know if this helped you or not.
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