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Lenovo Laptop not detecting external monitor(s)

Anonymous
2024-02-28T04:42:10+00:00

My Lenovo Laptop is no longer recognizing my external monitors. this worked fine until a few days ago. I have updated, removed, reinstalled the intel graphics driver and run intel diagnostic as well as windows diagnostic. All internal HW passes tests. The computer thinks it is fine.

When I take the same usbc hub and connect it to my cell phone it is able to detect and display on the external monitors but starting a few days ago my laptop has just decided to stopped detecting the external monitor(s). I have two usbc ports on my laptop and I have tried the hub connected to both ports and neither will detect the external monitors. Is it possible that the error is related to the ports and not the graphics card? If so how do i diagnose or test the ports?

Windows for home | Windows 11 | Display and graphics

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  1. Anonymous
    2024-11-20T01:12:51+00:00

    After doing some research I found the only advice that worked for me.

    1. Remove all cords from the computer
    2. Shutdown the computer
    3. Hold down the power button for 60 seconds
    4. Turn on the computer
    5. Attach the external monitor

    HTH!

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  1. Anonymous
    2025-02-28T00:25:55+00:00

    I am having a similar problem with my Lenovo Yoga 2-in-1 16AHP9. I have two external monitors. Up until recently I had one connected via a hub to the DisplayPort USB port and the other monitor connected via the built-in HDMI port, extending my Windows 11 screens across 3 displays. Now it is one or the other, but not both. As soon as I plug in the second monitor, the USB-connect DisplayPort signal drops and that monitor goes to sleep. I've swapped the two monitors, Both work fine alone connected to either the HDMI or USB/DisplayPort, but not both. It is always the USB/DisplayPort connected monitor that drops.

    I tried the fix suggested elsewhere in this thread, to remove all connected peripherals, shutdown, hold power button off for 60 seconds, turn on, reconnect--but the problem remains.

    At first I thought this was an issue with the hub, but the hub functions fine alone and I've tried 2 different hub manufacturers.

    UPDATE:

    I eventually got the 2 external monitors working after some additional steps. I'm not sure what role the the Diamon D steps played in this since they were performed first, but without immediate success. I'll refer to my two external monitors as HP23 and GP27:

    1. with only the GP27 connected via USB-C/DisplayPort hub, I powered off the monitor
    2. Unchecked/turned off "Remember Windows Location Based on Monitor Connection" in Win11 Display Settings
    3. Unplugged GP27 from USB-C/DisplayPort hub and plugged into the laptop's HDMI port (the monitor
    4. Powered on the GP27 (it came up at 1920x1080 resolution remembered from an earlier troubleshooting attempt even though monitor is capable of 2560x1440)
    5. Connected the HP23 monitor to the USB-C/DisplayPort hub (it did not come on right away, but showed up in the Win11 Display Settings monitor arrangement window as inactive)
    6. In the Win11 Display Settings monitor arrangement window, I selected "Extend Desktop to this Display" (Viola! the HP23 connected via the hub came alive)
    7. I rearranged the monitor positions in the Win11 display window
    8. Changed the Win11 Display Resolution for the GP27 monitor to it's max 2560x1440.

    It's now been 24 hours and one laptop sleep/awake cycle and the monitors seem are functioning as desired. Fingers crossed.

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  2. Anonymous
    2024-04-02T19:56:48+00:00

    Hi, I have the same problem. It seemed to start happening after a windows (or system) update. I used to have the monitor connected directly via the HDMI port and it worked fine for years, connected every time. Now it connects intermittently, but only after unplugging re-booting and lots of stuffing around. Some-times takes up to 30 minutes to get it to connect. My second laptop (Dell XPS) connects fine to the monitor. I've tried connecting my Lenovo to a different external monitor and that didn't work either. I've tried connecting via USBc adapter and a USBc Hub and both didn't work every time, only connect after the annoying procedure above.

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  3. Anonymous
    2024-09-01T23:38:21+00:00

    yep i have this exact issue on mine too

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  4. DaveM121 867.7K Reputation points Independent Advisor
    2024-02-28T07:45:04+00:00

    Hi, I am Dave, I will help you with this.

    This problem is nearly always caused by the Hub you are using, is there any separate drivers required for the Hub that may need to be installed?

    If you connect an external monitor directly to your laptop, does it work correctly?

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