Have you tried resetting it with hard keys?
More info here:
https://www.t-mobile.com/support/devices/android/samsung-galaxy-tab-a-80/device-resets-samsung-galaxy-tab-a
Beware it may erase data on your device.
SOURCE: my galaxy tab is locked up and will not boot up I
As it is very difficult to remove the battery (or if you can do it easily then remove it) I would suggest to let it remain so and when the battery dies, it will on its own switch off. The you can recharge it and power it on and remove/uninstall this new program that you installed. It is not suiting the tablet.
SOURCE: i need to download user manual for samsung galaxy
You can download the available documents from the following website.
http://www.samsung.com/uk/support/search/supportSearchModelResult.do?menu=SP01&searchWord=galaxytabpc&default_searchInputBox_value=Enter+model+number+or+keywords&searchInputBox=galaxy+tab+pc+
Please let me know if you require any further assistance.
Thanks
SOURCE: Hi, I have a Samsung Galaxy Tab Tablet and would
It can't be done. There are technical along with legal issues.
SOURCE: samsung galaxy tab . written manual I would like
http://www.samsung.com/us/support/downloads/SCH-I800BKAVZW if this helps please vote
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