S8 is pulsing and won't turn on

[hmoney29]

Before going to bed I put my S8 on Flight Mode and not connected to the charger. I woke up this morning and my phone is off and it's pulsing. I tried hard restart but it's not doing anything. I have plugged it into the charger but nothing.

 

[Rukbat]

Plug in the charger and wait at least an hour, then hold the power button in until it starts (it could take as long as 30 seconds).

 

[hmoney29]

Did this but still not working. I still have warranty so I'm bringing it in.