It won’t turn on at all and the screen is black. It also wont even show a light indicator if it wasn’t plugged in with its adapter.
From your description, it looks like the light indicator is for charging.
That means the power light is off.
Please refer to below steps to hard reset the unit.
Solution: (Power light is OFF) "Power light is OFF" means there's no power supply from the ac adapter or major components might be abnormally working and the device fails to boot.