Laptop LCD with external monitor

[RandomGravity]

I'm using a PC with Windows 10. I want to use an external monitor as the only monitor. I pressed Win+P and selected "second screen only" so that when the external monitor is on, the laptop LCD turns off. The problem is that when I turn the external monitor off, the laptop LCD turns on. How do I keep the laptop LCD off when the external monitor is off?

 

[jarotech]

Hi, if you don't close the lid, this is the way laptops are working, if you power off the external, the laptop become the screen by default.

 

[Aurimas_4]

Hi, if you don't close the lid, this is the way laptops are working, if you power off the external, the laptop become the screen by default.

how to close the lid if there is no lid ?