Windows 10: Windows not booting with external monitor pluged in

Hey there, I have the following problem:I have my Lenovo Yoga 260 Win10 notebook plugged into the external monitor. I try to start it up with it's screen closed and the booting of windows is interrupted followed by black screen with only white dash blinking in the left upper corner. My output is duplicated and drivers are up to date. Is there something I'm doing wrong

:)

 

Windows 10 upgrade: can no longer connect to an external monitor

Hi,

Thank you for posting in Microsoft Community, we appreciate your interest in Windows 10.

I understand the inconvenience you are facing with accessing the external monitor in Windows 10, we will help you with this issue.

As you have tried most of the troubleshooting steps, let us know the following to assist you better:

• What exactly happens when you try to connect to the external display?
• Were you able to see the light on the external monitor (Tuned on/ not)?
• Is there any error message with this issue?

Step 1: As this may look very silly, I suggest you to check if the turned on or not, if it is on let us know the color of the light displayed.

Step 2: I suggest you to remove all the external devices except mouse and keyboard and try to perform clean boot to check if there is any issue with the device and to avoid any third party software conflict.

Disclaimer: Putting your system in
Clean Boot state helps in identifying if any third party applications or startup items are causing the issue. You need to follow the steps from the article mentioned below to perform a Clean Boot.

How to perform a clean boot in Windows



(Applies to Windows 10 as well)

Note: Refer "How to reset the computer to start normally after clean boot troubleshooting" to reset the computer to start as normal after troubleshooting.

Hope it helps. Please perform the above methods and update the status of this issue, we will be happy to help you.

 

External monitor blanking often

Hi,

Please answer these questions to assist you better.

• What is the make and model of your computer and external monitor?
• Have you installed all pending Windows and driver updates?
• Do you get any error message?

I suggest you to install all pending Windows updates in your PC and also update Display drivers. Follow the steps below.

Step 1: I would suggest you to check and install any latest Windows Updates available.

• Go to Start and then Settings.
• Click on Update and Recovery.
• Check for updates under
  Windows Updates.
• Restart the system and check if the issue is resolved.

Step 2: Please refer to the following Wiki article created by
Andre Da Costa on How to: Install and Update drivers in Windows 10.

Redirecting

Do let us know if you still get random black screen in the external monitor. Thank you.

 

External monitor display settings

Hi,



Thank you for posting in Microsoft Community.



I understand that you are facing issues with the display scaling on your external displays. We will certainly look into this for you.

As you are using Vizio TV, you may have to try using custom resolution settings if the in-built settings do not provide the required settings.

For better clarity, please let us know:

• What is the version of Windows 10 that is currently installed on your computer? You can click on Search and type
  winver.
• Are you aware of any recent changes to the system, such as updates, after which you are facing this issue?
• What is the make and model of your computer?

Meanwhile, I would suggest you to check the steps mentioned in the Workaround section in

Windows scaling issues for high-DPI devices

I would also suggest you to check the Display drivers. Please refer

Troubleshoot external monitor connections in Windows 10

Set up dual monitors on Windows 10



Let us know how it goes.

Regards,

Vivian S