Windows 10: External monitor detected but no signal

Discus and support External monitor detected but no signal in Windows 10 Drivers and Hardware to solve the problem; Hi everyone, I have a Dell XPS 9350 running Windows 10 and a Xiaomi L55M5-5ASP 4K. The laptop only has a USB-c for connecting an external display,... Discussion in 'Windows 10 Drivers and Hardware' started by Sivan_BH, Mar 11, 2021.

  1. Sivan_BH Win User

    External monitor detected but no signal


    Hi everyone,


    I have a Dell XPS 9350 running Windows 10 and a Xiaomi L55M5-5ASP 4K.

    The laptop only has a USB-c for connecting an external display, and the TV only has HDMI, so I plugged in a cheap USB-c to HDMI cable I bought a while ago, and it works, except the refresh rate is a bit low.


    So I bought a more serious cable - Unitek V1125A. When connecting this cable, Windows showed the external screen as a BillBoard device, and simultaneously it appeared as an additional display in display settings. The TV, on the other hand, says there is no signal. I thought maybe the cable is defective, but when I use it to connect my phone to the TV, it works just fine.


    I read there are sometimes incompatibility issues with cables like that so I bought another cable - QGeeM USB C to HDMI Cable 4K. This one has almost the same issue, the only difference, it seems, is that I don't get a BillBoard device in Device Manager. What I do get as I also did for the previous cable is a second Generic PnP Monitor under Monitors, as well as USB 3.1 eXtensible Host Controller - 1.10 under Universal Serial Bus controllers.


    I have tried updating drivers and firmware, Windows update, various resolutions and refresh rates, duplicate/extended display, setting the external monitor as primary... nothing works. Any ideas?


    Thanks!

    :)
     
    Sivan_BH, Mar 11, 2021
    #1

  2. External Monitor not detected

    I am running windows 10 on a MacBook Pro using bootcamp. I use a imac as an external monitor. Windows cannot "detect" the monitor. using a firewire connection, which works splendidly under OS. Any suggestions?
     
    DaveMichaelson, Mar 11, 2021
    #2
  3. External monitor detected but no signal

    Bence, if the steps I gave can't get the monitor detected then I know of nothing else because they always have worked before.

    See if this helps to set the resolution separately:

    https://www.addictivetips.com/windows-tips/diff...
     
    Greg Carmack - Windows MVP 2010-20, Mar 11, 2021
    #3
  4. External monitor detected but no signal

    External Monitor Detected but Does not Display

    I have a Surface Pro 3 running Windows 10, creators update 1803.

    When attempting to connect to an external display (mini DisplayPort to HDMI), Windows detects the monitor but displays no signal.

    The extended desktop appears in screenshots, but nothing on the monitor itself.

    So far, I have:

    • Updated Surface Pro 3 firmware
    • Checked for all Windows update
    • Tested with multiple monitors (at least 4)
    • Tested with multiple cables
    • Tested with multiple adaptors
    • Updated Intel Graphics 4400 HD driver
    • Removed Intel Graphics 4400 HD and reinstalled
    • Rebooted more times than I can count

    Any advice?
     
    JonCarlson1, Mar 11, 2021
    #4
Thema:

External monitor detected but no signal

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