I have a current setup of two screens on my desktop, but every now and then I want to connect my tv as well. I currently have a HDMI switch to toggle from a screen to the tv, but that isn't working all too well.

If I just connect the tv straight into the pc, Windows will switch to three screens, as expected, but will do so regardless of whether the tv is on or not. So I'm looking for a way to be able to toggle the third screen on and off from within Windows. I can't find whether that is possible or not, because when I google, all I can find is stuff about turning touch-screens on or off.

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1 Answer

You can set a monitor as connected or disconnected through the settings in Windows 10. This effectively enables/disables that monitor, but if you unplug the cable or on some monitors turn off the power, the monitor itself may get uninstalled and reinstalled upon turning on the monitor or plugging the cable in, and this may reset your settings.

In order to do this, do the following:

• Open the Start menu
• Press the Gear (settings) icon
• Navigate to System
• Click on Display
• Choose the display you want to enable/disable
• Scroll down to the section called Multiple Displays.
• In the combobox alter the connection type
  • Extend to this display: The monitor is enabled.
  • Disconnect this display: The monitor is disabled.

It is not directly possible to do this from the commandline, but there are some tools available that do this for you, such as Nircmd.

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