Samsung 10.1 sm-t580 android lock screen is now black
Just bought Samsung Galaxy tab A 10.1 sm-t580. I set it up last night. All was fine. Then today turned on tab but lock screen is black. I can enter the password with no problem and open tab. I tried a few times to add photo, tapped 'lockscreen' but lock screen is still black. Don't know if I did something or not.
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