1. Joined : Dec 2015
    Posts : 4
    Windows 10
       03 Dec 2015 #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 System SpecsSystem Spec

  2.    03 Dec 2015 #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 System SpecsSystem Spec


  3. Joined : Dec 2015
    Posts : 4
    Windows 10
       03 Dec 2015 #3

    batlhilz said: View Post
    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 System SpecsSystem Spec


  4. Joined : Jul 2014
    Serbia
    Posts : 6,985
    All kinds
       04 Dec 2015 #4

    Did you try to reinstall proper GPU drivers ?
      My System SpecsSystem Spec

  5.    04 Dec 2015 #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 System SpecsSystem Spec


  6. Joined : Dec 2015
    Posts : 4
    Windows 10
       04 Dec 2015 #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 System SpecsSystem Spec


  7. Joined : Dec 2015
    Posts : 4
    Windows 10
       04 Dec 2015 #7

    CountMike said: View Post
    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 System SpecsSystem Spec


  8. Joined : Jun 2016
    Posts : 1
    windows10
       10 Jun 2016 #8

    second monitor no longer conencts


    KACI said: View Post
    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 System SpecsSystem Spec


 


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