i have found the solution. this happened to me last night into today. i tried everything!!!! just got note 8 a week ago. phone died over night and went completely dead. i read one of the comments on here and sparked an idea. with the battery needing a lower voltage to begin a charge than the fast charge puts out. so what i did was find an old android charger or fire stick charger is actually what i used. i attached adapter that come with phone in box so will fit in note 8. then plugged USB into an old laptop i have with USB 2.0. this put out a low enough voltage to trickle charge it where the screen popped on the circle and just lighting bolt with no percentage of battery charge. i let sit for about ten minutes then switched back to my fast charger and its working!!!! beyond ecstatic right now. thought i lost everything.