Samsung s6 blue light and black screen, unresponsive with buttons

Oct 24, 2018
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!