Galaxy s6 tablet lite not turning on

Hey guys I had my tablet plugged in while drawing on it but it ran out of power anyways, so I just left it charging. It had that lightning bolt and battery symbol for a few hours and then turned on, i left it still plugged and the next day it turned off and had a flickering black screen while charging, it has been 2 days and it has not booted. I tried holding power button and volume +, power and volume -, and power by itself but nothing. What should I do? It been over a year since I bought it so I dont believe it is still under the warranty.