Samsung s6 blue light and black screen, unresponsive with buttons

Oct 24, 2018
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Hello, I’ve used all the guides online but nothing seems to work, none of the button work, so I can’t turn it off or do anything of the sort. But sometimes it flickers with a white light on the side of the phone. So I’m looking if I can find a fix before looking for a technician. Thank you for your help in advance!