On most laptops you will need to hold the power button all the way and hold for about 30 seconds then let go once you see the screen turn back on.
Disconnect any power and cables from the laptop. Hold the power button until you see the light on the button flicker then let go once the keys on the keyboard light up. If that doesn't work, reconnect the power cable into the laptop and repeat the previous step.
If it does not work, reach out for additional support. (Mention this article)