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EugeneLoy/Turn off Screen.bat

Last active February 13, 2025 15:37
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Turn off Screen.bat
powershell (Add-Type '[DllImport(\"user32.dll\")]^public static extern int PostMessage(int hWnd, int hMsg, int wParam, int lParam);' -Name a -Pas)::PostMessage(-1,0x0112,0xF170,2)
@Shazib
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Shazib commented Jun 22, 2024 •
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I'm having a problem using this powershell script on my Asus MiniPC PB60. It does turn off the monitor. I set it up in Task Scheduler to run when the machine is locked. Works like a charm. Trouble is that it seems to disable background processes, too. I'm using this machine primarily as an iTunes and HomeBridge server. But if I use this script, both HomeBridge and iTunes stop working with the machine locked. It also takes out the little utility that controls the UPS, which is connected by USB. As long as I don't use this script to turn off the monitor, everything works fine with the machine locked.

Any ideas? Is there a way to modify this script to turn the monitor off, but allow everything else to keep running?

It seems like this is an issue with modern standby modes. When you turn the monitor off in this way it puts the entire machine into sleep mode. I'm guessing that this only happens on devices such as laptops.

There is a stack overflow post here discussing it, and offering some recommendations for alternative API's you can call to resolve

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