Windows 10: My second monitor is not detected but still mirrors my first.

Discus and support My second monitor is not detected but still mirrors my first. in Windows 10 Customization to solve the problem; My graphics card only has 1 HDMI output and I used an HDMI splitter which has two monitor extended mode support in order to get around this issue. In... Discussion in 'Windows 10 Customization' started by BillyPeitsch, Feb 12, 2020.

  1. BILLYPEITSCH
    BillyPeitsch Win User

    My second monitor is not detected but still mirrors my first.


    My graphics card only has 1 HDMI output and I used an HDMI splitter which has two monitor extended mode support in order to get around this issue. In settings, my second monitor which is a small VIZIO TV is not detected but it is mirroring my first monitor. I have looked at guides and troubleshooted for hours to no avail. Any help would be appreciated.

    :)
     
    BillyPeitsch, Feb 12, 2020
    #1
  2. ROBERTHELLEN1
    RobertHellen1 Win User

    Windows 10 will not detect second monitor and just mirrors the display

    Hi

    My son has a gaming pc with a new NVidia video card and running Windows 10 I believe and we have just purchased an ultra wide gaming monitor for his birthday.

    He wishes to keep his AOC existing monitor and have 2 monitors up and running and to extend the display and not mirror.

    We have connected both via HDMI using I think the term is a HDMI splitter purchased from Amazon.

    We have updated the Nvidia drivers as suggested and ensured all the cables are connected but when we go to Settings and additional display it does not detect the second monitor and the display is mirrored with no option to extend.

    Searched on the web for half a day with no real suggestions. I use 2 monitors at work without issue so cannot explain to him why it will not detect the 2nd display.

    Any help would be greatly appreciated. Thanks.
     
    RobertHellen1, Feb 12, 2020
    #2
  3. AILEEN ALF
    Aileen Alf Win User
    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 It could be due to your video driver being outdated, incorrect or faulty.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.
     
    Aileen Alf, Feb 12, 2020
    #3
  4. BRIANBLUTO
    BrianBluto Win User

    My second monitor is not detected but still mirrors my first.

    second monitor not detected

    so after a windows 10 update on 11/23/17 my second monitor is not detected any more I do have a mirror image though. I have checked to see if the drivers are up to date and they are. I restored the computer back to 11/15/17 and that worked for about an
    hour then it D/L the update again and I'm back to a mirror image. also the display resolution is set for 1280x1024 but looks more like 800x600
     
    BrianBluto, Feb 12, 2020
    #4
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My second monitor is not detected but still mirrors my first.

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