Share via

Monitors - No Signal Detected - Extensive troubleshooting already done

Anonymous
2024-06-04T17:23:31+00:00

Yesterday my work laptop slid off my desk. It pulled the USB-C out of the port. The USB-C is connected to a Lenovo dock, which in turn, are connected to two monitors. Since then, I cannot get my monitors to be detected.

Information:

  • The dock was unaffected in the laptop falling. It did not have the USB-C pulled out from it. No tension was put on it and there was no trauma to the dock itself.
  • My mouse and keyboard are still detected.
  • When plugging in the DP/VGA, the monitor acts like it’s detecting and then stops. The laptop will not act like it’s detected, E.G. screen turning black while connecting.

Monitors:

  • Dell 07R1K3 connected by VGA
  • Asus VG248QE connected by DP

Troubleshooting:

  • Replaced dock
  • Replaced USB-C
  • Replaced power supply to dock
  • Used new DP cords to both monitors and tried VGA > DP adaptor
  • Power cycled monitors, computer, and dock
  • Plugged in another laptop that the dock/monitors previously worked on with no results
  • Unable to do a factory reset, as OSD menu only appears if the monitors are detected.

At this point, I’m not sure what to do. It’s clearly not a driver issue, cord issue, or hardware outside of the monitors. Replacing my monitors is not an option. Does anyone have any ideas?

Windows for home | Windows 10 | Devices and drivers

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

4 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2024-06-06T12:31:12+00:00

    Hello,

    I have done so and they are still undetectable. I have tried two other laptops as well, and it is yielding the same results, so the laptop cannot be the common factor.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2024-06-06T09:25:02+00:00

    Thank you for your reply.

    Then I recommend you try to enter the device manager to check your monitor devices, if you can find the corresponding devices, you can remove them, and then use the HDMI cable to connect them, to observe whether it can be detected.

    If it is still undetectable, it is possible that your laptop's motherboard or USB ports have been damaged to some extent due to slippage.

    You can continue to feedback your situation, look forward to your reply.

    Best Regards.

    Leo.L - Microsoft Community Support Specialist

    Was this answer helpful?

    0 comments
  3. Anonymous
    2024-06-05T18:35:41+00:00

    Hi Leo,

    I plugged in the HDMI cord directly to my PC from both monitors. It yielded the same results. When I put the cord into the PC, the monitor will light up, say no connection, and go to sleep. The PC gives no indication of a connection.

    Was this answer helpful?

    0 comments
  4. Anonymous
    2024-06-05T09:39:20+00:00

    Hello, Cody Ostrander.

    Welcome to Microsoft Community.

    Thank you for your description of the problem.

    I understand that you are experiencing an undetectable monitor after your laptop slipped and you connected your laptop device to a docking station and then connected other external devices including your monitor through the docking station and can detect your mouse and keyboard.

    I noticed that you have tried a lot of troubleshooting methods such as replacing the docking station, power supply and connecting cables. However, these troubleshooting are not complete and since this is designed with multiple devices or cables, we need to perform more tests.

    According to your description, there are 3 main reasons why the monitor cannot be detected: a faulty USB port on the laptop device, a faulty dock, and a faulty monitor.

    Among them, I presume that the possibility of monitor failure is the lowest, you can check whether the interface of the laptop is faulty by connecting the laptop directly to the monitor.

    If the monitor can be detected by direct connection but not by dock connection, it is possible that the dock is faulty, and you can get after-sales support from the dock manufacturer.

    The above is one way of troubleshooting that I can offer you, I hope it can help you.

    If you need further assistance or you will provide more information, please feel free to let us know and we will follow up on your issue.

    Best Regards.

    Leo.L - Microsoft Community Support Specialist

    Was this answer helpful?

    0 comments