Title screen keeps rebooting (not rooted)

I went to turn my Tab on when it suddenly turned off,

no screen flashes on and off with the "Samsung loading screen"

then to a dark screen over and over again. About 5 second intervals,

I've tried booting it to safe mode, but it flashes THAT screen of half a second and turns to a dark screen Again. No buttons are working. I've tried hard resetting, nothing. Charging seems to do nothing. But i'm willing to try charging it to 100%.

So is there any hope? Or should I send it in?