Hi Hozzer,
Welcome to the Microsoft community.
This issue might have occurred due to corrupted display adapter drivers or HDMI port may not be recognized. I would suggest you to run hardware and device trouble shooter and check if it helps.
- What is the status for HDMI port in device manager properties?
To check:
- Press windows key + R key
- Type devmgmt.msc
- Now under display adapters, right click on the HDMI port option and select properties and check the device status
I would suggest you to run the Hardware and Devices troubleshooter and check if there is any hardware issue.
a) Press Windows key + W on your keyboard.
b) Type Troubleshooting and click Troubleshooting.
c) Click on View All.
d) Click on Hardware and Devices Troubleshooter.
e) Click on Next button to run the troubleshooter.
Hope this information was helpful and do let us know if you need further assistance. We will be glad to assist.