Windows 10: Second monitor shows up in BIOS and Device Manager but not Windows

Discus and support Second monitor shows up in BIOS and Device Manager but not Windows in Windows 10 Graphic Cards to solve the problem; Hi, So I have a dual-monitor setup hooked up to my port replicator for my Dell E7240. I have my main monitor hooked up with a DVI cable and my... Discussion in 'Windows 10 Graphic Cards' started by SnoopKatt, Sep 15, 2015.

  1. SNOOPKATT
    SnoopKatt Win User

    Second monitor shows up in BIOS and Device Manager but not Windows


    Hi,

    So I have a dual-monitor setup hooked up to my port replicator for my Dell E7240. I have my main monitor hooked up with a DVI cable and my second monitor hooked up with a DisplayPort (from the port replicator) to HDMI (on the monitor) cable. This setup has worked fine over the past year, and I didn't have an issue with it on Windows 10 up until today. Now, I only see an image on the monitor in the BIOS and the Windows 10 startup screen (duplicated on both screens), but once I get to the login screen, the monitor does not detect a signal. I've reconnected the cable, attached/detached the laptop, and updated to the latest Intel HD 4400 drivers from Intel's site. The other interesting thing is that although there is no picture, it detects both monitors in the Device Manager. I'm pretty confused why this stopped working as I haven't changed anything. Any ideas?

    Thanks!

    EDIT: Fixed it by searching a little deeper (kinda tricky when everyone words it differently :/ ) and hitting the Windows key + P and clicking "Extend" brought it back!

    :)
     
    SnoopKatt, Sep 15, 2015
    #1
  2. KITTIPING
    kittiping Win User

    How to add multiple monitors to your Windows 10 PC

    That's a lovely helpful article that completely fails to mention how you get windows to recognise the second monitor in the first place, mine just says 'second monitor not detected' I've been through the forum and the bios and the device manager setting
    and the drivers and I cannot get it to stop being another screen showing the same thing. Why doesn't it detect it? I'm on a splitter, Dell desktop with only standard video, no extra graphics card trying to hook up a Dell and a Samsung monitor
     
    kittiping, Sep 15, 2015
    #2
  3. FELEGUARON
    Feleguaron Win User
    Second Monitor going to sleep on Windows 10 boot

    Ok, i have a problem here. Got a second monitor other day, trying to get it to work. Main monitor is hooked up to radeon 390 (with latest 17.3.1 drivers) and working fine. Second monitor is not showing up anywhere. When i boot the PC, shows the Asus and
    windows loading screen's and then goes into sleep mode. Not being picked up by windows in the device manager or anywhere else. No warnings in the device manager , second monitor is connected by a DVI-D cable, tested monitor on another pc, working fine, no
    sleep mode or anything.

    Running Windows 10 x64 Pro, version 1607, build 14393.693

    ***Post moved by the moderator to the appropriate forum category.***
     
    Feleguaron, Sep 15, 2015
    #3
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Second monitor shows up in BIOS and Device Manager but not Windows

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