Stuck in a power on loop

[AC Question]

I let it drain itself down it would say LG then power off and do it all over again. I let it die on its own then tries plugging it in to the charger but the screen is still flickering on and off saying 0%. There's no mods

 

[B. Diddy]

Welcome to Android Central! The Power button might be damaged or defective. Is it still under warranty?