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; I have a Lenovo Yoga 910 laptop. I connected an external monitor via USB-C->HDMI adapter but can't duplicate or extend to it. When I switch to... Discussion in 'Windows 10 Drivers and Hardware' started by Bence Szigeti, Mar 10, 2020.

  1. External monitor detected but no signal


    I have a Lenovo Yoga 910 laptop. I connected an external monitor via USB-C->HDMI adapter but can't duplicate or extend to it.

    When I switch to duplicate, extend, or second display, the setting goes back to PC screen only.


    The monitor, adapter and HDMI cable works because I can use the monitor on Linux without any problemSame system, same setup, dual-boot with Windows.


    What I've tried:

    • Updating driver
    • Several older versions of Intel Graphics drivers both DCH and Legacy from official Intel site,
    • Driver from Lenovo's site.
    • I tried with Windows 1903, 1909, Insider Slow, Insider Fast versions.


    The Intel Graphics Control center reports the following:


    Processor: NA

    Processor Speed: 2904 MHz MHz

    GFX Driver Name: IntelR HD Graphics 620

    Shader Version: 5.1

    OpenCL* Version: 2.1

    * Microsoft DirectX* *

    Runtime Version: 12

    Hardware-Supported Version: 12

    Vulkan* Version: 1.2.131

    Vendor ID: 8086

    Device ID: 5916

    Device Revision: 02

    GFX Driver Version: 26.20.100.7870

    GFX Vulcan: 1.2.131

    GFX GOP: 9.0.1054


    * Devices connected to the Graphics Accelerator *


    Active Displays: 2


    * Digital Display 1 *


    Display Name: Built-In Display

    Display Type: Digital

    Serial Number: -

    DDC2 Protocol: Supported

    Gamma: 2.2

    Connector Type: Built-In Display


    Maximum Image Size

    Horizontal - 12.2 inches

    Vertical - 6.69 inches


    Supported Modes

    1920 x 1080 60p Hz


    Power Management Support

    -


    Raw EDID:

    00 FF FF FF FF FF FF 00 06 AF 3D 32 00 00 00 00

    00 19 01 04 A5 1F 11 78 02 3D F5 A4 56 50 9B 25

    11 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01

    01 01 01 01 01 01 14 37 80 B8 70 38 24 40 10 10

    3E 00 35 AD 10 00 00 18 00 00 00 0F 00 00 00 00

    00 00 00 00 00 00 00 00 00 20 00 00 00 FE 00 41

    55 4F 0A 20 20 20 20 20 20 20 20 20 00 00 00 FE

    00 42 31 33 39 48 41 4E 30 33 2E 32 20 0A 00 A0




    * Digital Display 2 *


    Display Name: S24F350

    Display Type: Digital

    Serial Number: H4ZMC01889

    DDC2 Protocol: Supported

    Gamma: 2.2

    Connector Type: DisplayPort


    Maximum Image Size

    Horizontal - 20.47 inches

    Vertical - 11.42 inches


    Supported Modes

    640 x 480 60p Hz

    640 x 480 67p Hz

    640 x 480 72p Hz

    640 x 480 75p Hz

    720 x 400 70p Hz

    720 x 480 60p Hz

    720 x 576 50p Hz

    800 x 600 56p Hz

    800 x 600 60p Hz

    800 x 600 72p Hz

    800 x 600 75p Hz

    832 x 624 75p Hz

    1024 x 768 60p Hz

    1024 x 768 70p Hz

    1024 x 768 75p Hz

    1152 x 864 75p Hz

    1152 x 870 75p Hz

    1280 x 720 50p Hz

    1280 x 720 60p Hz

    1280 x 800 60p Hz

    1280 x 1024 60p Hz

    1280 x 1024 75p Hz

    1440 x 900 60p Hz

    1600 x 900 60p Hz

    1680 x 1050 60p Hz

    1920 x 1080 50p Hz

    1920 x 1080 60p Hz


    Power Management Support

    Active Off Mode Supported


    Raw EDID:

    00 FF FF FF FF FF FF 00 4C 2D 20 0D 34 41 57 43

    31 1D 01 03 80 34 1D 78 2A 93 15 A6 55 51 9C 27

    11 50 54 BF EF 80 71 4F 81 C0 81 00 81 80 95 00

    A9 C0 B3 00 01 01 02 3A 80 18 71 38 2D 40 58 2C

    45 00 09 25 21 00 00 1E 00 00 00 FD 00 32 4B 1E

    51 11 00 0A 20 20 20 20 20 20 00 00 00 FC 00 53

    32 34 46 33 35 30 0A 20 20 20 20 20 00 00 00 FF

    00 48 34 5A 4D 43 30 31 38 38 39 0A 20 20 01 E1


    02 03 11 B1 46 90 04 1F 13 12 03 65 03 0C 00 10

    00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 09 25 21

    00 00 1E 8C 0A D0 90 20 40 31 20 0C 40 55 00 09

    25 21 00 00 18 8C 0A D0 8A 20 E0 2D 10 10 3E 96

    00 09 25 21 00 00 18 00 00 00 00 00 00 00 00 00

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 51


    So, the monitor is detected but I'm not able to make it work.

    Do you have any ideas? This drives me crazy.


    Thanks,

    Bence

    :)
     
    Bence Szigeti, Mar 10, 2020
    #1

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    DaveMichaelson, Mar 10, 2020
    #2
  3. 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 10, 2020
    #3
  4. mprop Win User

    External monitor detected but no signal

    External monitor not detected


    Hi,
    I have a Lenovo laptop Yoga 2 11. I was running windows 8 with an external HDMI monitor in the office.
    When I upgraded to Windows 10, I plug and unplug the external monitor and it is not detected by the operating system, only one display is shown- However if I run the computer with the lid closed the external monitor gets the signal. Strange that always shows only one display. I do not know how to show the image in both screens (if possible!), so I can be looking at the laptop screen and at the same time project to a large television for presentations, since the external monitor seems not to be shown by Windows 10.

    Any help? Is a windows 10 bug and will be a patch??

    Regards,

    Martin
     
    mprop, Mar 10, 2020
    #4
Thema:

External monitor detected but no signal

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