During work I fold the laptop an left for half an hour and when I reopen the screen full black, how I can restart my laptop

[zzziaurrahman]

Laptop fold in running position and when reopen screen is black

 

[Saga Lout]

Try a very light and quick touch on the Power button.

Some models need that to wake them out of sleep mode. Pressing the button for too long turns the power off completely.