Windows 10: Does not detect second monitor

Discus and support Does not detect second monitor in Windows 10 Drivers and Hardware to solve the problem; I have two identical monitors Acer 240H, but lately one screen comes on but then shows "No Signal."I've read that this can be an issue, and have... Discussion in 'Windows 10 Drivers and Hardware' started by greenbldgstudent, Sep 15, 2021.

  1. Does not detect second monitor


    I have two identical monitors Acer 240H, but lately one screen comes on but then shows "No Signal."I've read that this can be an issue, and have overcome the issue a few times, but now can't find the info or get it to see or detect my second monitor. I have an HP Omen the monitors were both connected to with a DVI cable, and now I've even tried swapping the one at issue to use HDMI ports, but still nothing. This is really making it difficult for me to work. My other monitor boots up, but then doesn't seem to be getting signal from my PC on either cable. Does anyone know what the cause mi

    :)
     
    greenbldgstudent, Sep 15, 2021
    #1

  2. 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 It could be due to your video driver being outdated, incorrect or faulty.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, Sep 15, 2021
    #2
  3. Kapil Arya MVP, Sep 15, 2021
    #3
  4. Does not detect second monitor

    Second monitor not detected after update

    Hi Tom,

    There are several reasons that could have caused the issue you are experiencing. One of these is the update you previously performed in Windows, either it was not configured properly by the system or the update components were corrupted. Kindly answer the
    following questions for clarification:

    • Have you tried updating the monitor and display drivers?
    • Have you tried to use another user profile to check if the issue re-occurs?

    Furthermore, we suggest that you add the other monitor manually. This is to ensure that the second monitor is still connected after the update. Here are the steps:

    • Type connected devices and open Connected Devices on the
      Windows Search bar.
    • Click Add devices.
    • Select the Second screen.
    • Pick one of the 3 options: Duplicate, Extend, and the Second screen only.
    • The Duplicate option will duplicate the primary display to secondary display.
    • The Extend option will unite two monitors so you can use them both as one.
    • The Second screen only option will, obviously, disable primary and use only the secondary monitor.
    • Once you’ve chosen the preferred mode, save changes.

    We're looking forward to your response.
     
    PreciousLeb, Sep 15, 2021
    #4
Thema:

Does not detect second monitor

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