Windows 10 doesn't detect my second monitor


  1. Posts : 4
    Windows 10
       #1

    Windows 10 doesn't detect my second monitor


    I just upgraded from Windows 7 to Windows 10 and now my computer only detects one display rather than two. I have a Dell desktop computer and two Dell monitors. Using Windows 7 both monitors were being detected/used. Can anyone tell me how to correct. (I'm not very technically experienced, but can follow basic instructions.)

    The second display shows a black screen with the message "Cannot Display This Video Mode".
      My Computer


  2. Posts : 438
    Win 10 pro 1803
       #2

    right click on desktop for "display settings" - pick the monitor that shows up that message -> click it to activate -> switch correct video mode for it. its prolly too high resolution issue.

    also WIN+P -combination gives you chance to use "extended desktop" which you should use to configure the resolutions
      My Computer


  3. Posts : 4
    Windows 10
    Thread Starter
       #3

    batlhilz said:
    right click on desktop for "display settings" - pick the monitor that shows up that message -> click it to activate -> switch correct video mode for it. its prolly too high resolution issue.

    also WIN+P -combination gives you chance to use "extended desktop" which you should use to configure the resolutions

    When I go to "display settings", there is only one monitor shown. If I click "Detect", it says "Didn't detect another display".

    When I do WIN +P, I see message "Your PC can't project to another screen".
      My Computer


  4. Posts : 19,516
    W11+W11 Developer Insider + Linux
       #4

    Did you try to reinstall proper GPU drivers ?
      My Computers


  5. Posts : 131
    Windows 10
       #5

    We need more info on your system. How r the monitors connected? Do you have an add on gpu? What driver is listed in divorce manager. As Count Mike asked, do you have the correct driver loaded? Have u tried to disconnect the second monitor and let Windows redetect it?
      My Computer


  6. Posts : 4
    Windows 10
    Thread Starter
       #6

    The issue has been resolved by concluding that my Dell Computer Optiplex 745C is too old (several years) and therefore there is not available a GPU driver that is available for Windows 10. The solution offered by a more computer literate friend, was to revert back to Windows 7. I have done that and now can use both monitors.

    Thanks for trying to help.
      My Computer


  7. Posts : 4
    Windows 10
    Thread Starter
       #7

    CountMike said:
    Did you try to reinstall proper GPU drivers ?
    See my later post. Couldn't find proper GPU driver for my older Dell computer. Had to revert back to Windows 7.

    Thanks for trying to help!
      My Computer


  8. Posts : 1
    windows10
       #8

    second monitor no longer conencts


    KACI said:
    We need more info on your system. How r the monitors connected? Do you have an add on gpu? What driver is listed in divorce manager. As Count Mike asked, do you have the correct driver loaded? Have u tried to disconnect the second monitor and let Windows redetect it?
    I have been using my Lenovo with a dual monitor for almost two years. I have it connected through a Plugable USB 3.0 docking station. I recently bought a small portable docking station and used it with a different second monitor and the new portable docking for the past couple of weeks at my daughter's house. I came back home and plugged my laptop into the 'permanent' Plugable USB 3.0 and now the second monitor is no longer recognized.

    I tried connecting directly to the laptop with a mini-hdmi converter cable - nothing. I tried rolling back the drivers - nothing. I updated the drivers again - nothing. I took the resolution down to 48, even though it has been working fine with 60 - nothing - so I changed it back.
      My Computer


 

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