Lenovo yoga tab3 keeps powering on and off

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Hello, trying to help my brother get this thing to work he says he had it working then he did the windows update to 10 and from then on it's a paper weight and i plugged it in and best i can get is it vibrates then it's bios splash screen shows then it's of again then lil bit later it does it again i will repeat this a few times then eventualy give up

is there a way through this problem or is just junk