Windows 10: External monitor sound not recognized

Hi,I just received a new Philips 345B1C ultrawide monitor and connected it via an HDMI cable to my Dell Inspiron 5400 AIO PC running the latest version of Windows 11 with all latest updates installed.The display shows perfectly but the sound will not play through the monitor, just through the PC speaker as normal, and there is a slight buzzing sound coming from the display when connected to the PC.I connected my XBOX to the monitor and that plays the sound fine with no buzzing, and connected another laptop to the monitor and that plays fine too.All drivers are up to date and I have tried diffe

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Laptop suddenly stopped recognizing the external monitor

Hi,

Thank you for posting your query in Microsoft Community.

To assist you better, I would like to ask if the laptop is unable to recognize only the external monitor or other external devices also.

I suggest you to run the Hardware and Devices troubleshooter by following the steps below:

• Click on the Start button, and type “Troubleshooting” on the search bar.
• Click on “Hardware and Devices”.
• A pop-up will appear, click on the “Next” button and your hardware troubleshooting will start.
  

Hope the information is helpful. Keep us posted on the status for further assistance.

 

No sound when connected to external monitor

Hi Bill,

To fix this issue, you can try the steps below:

• Plug in both ends of the HDMI without the laptop on.
• Turn the external monitor on and set to HDMI screen.
• Boot up your laptop from a shutdown position (not restart).
• Your laptop will now recognize the external monitor and will acknowledge its presence.
• Right-click the speaker icon on the task bar and choose
  View Volume Controls.
• Set TV as default.
• Click Apply, then click Ok.

You can also refer to the article in this
link to help fix sound problems.

Let us know how it goes.

 

Windows 10 won't recognize external monitor

I have a Lenovo Yoga 2 Pro with an ASUS MX279 external monitor. I just upgraded from 8.1 to Windows 10 and my computer does not recognize my external monitor. It doesn't look like ASUS has a Windows 10 driver on their website yet. Any suggestions on how
I can get my external monitor to work?

Thanks -

Alan