Turn off second monitor

Hello there VIK_777,

I understand you have two external displays connected to your MacBook and you would like to know if you can stop showing video to one display without physically unplugging it. If the display has a power button you could simply turn it off there. Otherwise these resources can explain how to use multiple external displays with your MacBook.

• Use multiple displays with your Mac
• Use external monitors with your Mac

If your second display is simply not showing video as expected, you may want to try these troubleshooting steps:

1. Plug the display into a different port.
2. Restart the computer.
3. Try a different HDMI cable.
4. Double check display settings located in Apple menu> System Preferences>Displays

Cheers!

The quickest way to find out is to try it.