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AmirMoh-2928 avatar image
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AmirMoh-2928 asked PercivalYang-MSFT commented

how can I add a second monitor without being detected in multiple display check?

I saw it on someone's computer. He'd connected a second monitor. but when I tried to detect it in multiple display setting, it did not show the second monitor. I also checked it in "Project" section by pressing Windows+P , again it showed " PC Only". The second monitor was there and working, but was kind of hidden and not detectable.
How could he do it? is it by using an passive VGA splitter? or is there a program to be installed?

windows-10-general
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Hi,
@AmirMoh-2928

Just checking in to see if the information provided was helpful.

If the reply helped you, please remember to accept as answer.
If no, please reply and tell us the current situation in order to provide further help.

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SSengupta-4080 avatar image
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SSengupta-4080 answered

Open Settings > System.

Click Display.

Go to the Rearrange your displays section and click Detect.

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PercivalYang-MSFT avatar image
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PercivalYang-MSFT answered

Hi,
@AmirMoh-2928
Just to confirm that you are using a desktop and your second screen is working not blank and black, right? So, is your second screen mirroring the first screen instead of extend?
You can try connect the two screen together in different order or separately to check if works well or has same situation. Please reply to me, it’s important to solve the problem.

The reason maybe the desktop or cable or monitor.
The fact that it is normal to connect more than 2 Screens to 1 PC. It depends on how much monitors your Graphic Card or Core GPU inside CPU like Intel UHD750 or AMD Vega 11 supports.

Firstly, you have to install and update the latest graphic driver.
Use win+X→Device Manager→display adaptor, you will know your GPU belong to which (AMD/Intel/Nvidia), download the driver from their official website please.

Secondly, you can link the monitor to the port (HDMI, DP, VGA, DVI) by cable accordingly on your motherboard or Graphic card. So you should check the quality of the cable, one screen one cable.
Note that it’s likely for certain ports on devices themselves don’t work properly, please take a little time to find out. Act with caution and slight strength to prevent device damage.

Here is the link includes the similar problem with solutions for your troubleshooting
https://answers.microsoft.com/en-us/windows/forum/all/windows-10-will-not-detect-second-monitor-and-just/2c888412-e673-44ac-9a24-d45a5b9e05a4

Hope this can help you
If your need further help, be free reply to me at your convenience.

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