when switch on it keeps going on and off continusly

not able to open it keeps geting on and then re boots again

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Did it start doing this after a specific event such installing an update or anything else that comes to mind? Have you tried booting into recovery to do a hard reset? Let us know what you have already tried and also mention if you have an idea of what caused the problem.

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Mine does the same. IT won't allow me to open an app or setting. Double tap isn't working too.

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