Windows 10: PC not detecting when monitor turns off

I have my PC connected to a TCL 4K TV via an Active HDMI cable.

Unlike my Mac, which usually detects when an external monitor is off and brings windows to the active display, my PC does not know the difference between when the TV is on or off.

So, whenever I want to turn it on, I have to go into settings and select my TV, and deselect it whenever I turn it off again.

Otherwise, my PC still treats the TV that is off as an active monitor and continues to display windows there.

How can I fix this?

Thanks.

:)

 

Second monitor not detected

Hello,

May we know if you've already tried the suggestion provided by Robert Aldwinckle on forums on this

thread?

If Windows can't detect your second monitor, it's usually a driver problem. It could be due to your video driver being outdated, incorrect or faulty. It's also possible that your monitor driver is causing the problem.

Since the issue occurred after the latest update, it's possible that the video or monitor drivers require an update. Try looking for the updated version of the drivers on the device manufacturer's website and follow their instructions.

If the issue persists, try to roll back the drivers to the last good configuration. To do that, you may follow these steps:

• Right-click the Start button and select Device Manager.
• Right-click your device driver, select Properties, and browse to the
  Driver tab.
• Press the Roll Back Driver option if available, and Windows 10 will begin the process.

Let us know how it turns out.

 

Night Light Setting and Third Monitor.

Hi Reagan,

We would like to ask you some questions in order assist you properly:

• Did Night light work previously on all three monitors?
• Have you made any recent changes to your PC?
• Are you getting an error message on the third monitor regarding Night light?
• Is the third monitor being detected by your PC?
• What troubleshooting steps have you performed so far?

While waiting for your response, we suggest that you try to connect your third monitor to what you are using on the 2 working monitors to see if it is only a loose connection issue.

Regards.

 

"monitor off" detection moving windows to turned off monitors

I have been pulling my hair out for months with my Triple 4K setup because every time the computer goes to sleep, the monitors get screwed up. I finally found a program that allows you to manually override EDID info for your displays and force your desired
resolution so the screens will always be setup correctly when you turn on the computer. The program is also free.

Check out Custom Resolution Utility

Custom Resolution Utility (CRU)

Once you run it:

• Disable all of the default "Established Resolutions"
• Delete all of the default "Detailed Resolutions"
• Delete all of the default "Standard Resolutions"
• Add a new "Detailed Resolution"
• Under new "Detailed Resolution" I left all of the settings the same except for the active horizontal and vertical pixel dimensions, which is obviously where you set your desired screen resolution.
• Then repeat steps 1-5 for each monitor.
• Once all monitors are configured properly, close CRU and run the restart.exe or restart64.exe included with CRU and you should be good to go!

I hope this helps other folks who are having similar issues to me with Windows 10 monitor auto detection and displayport connections.