Is there anyone else who faces this problem. Windows 10’s “Focus Assist” feature is a “Do Not Disturb” mode that hides notifications. You have to click on the link for 'night light settings' to find out.
If both the above-elaborated methods didn't fix your problem of HDMI not working on Windows 10, then you should try to check if your HDMI device is set as the default of not. Applies to: Windows 10 Original KB number: 4051625. It, however, can be used to combine with latest Windows 10 night light to reduce the among of blue lights emitting from the screen. How to Enable Light Mode on Windows 10Go to the Start menu.Navigate to Settings.Select Personalization and press on Colors on the left-hand sidebar.Scroll to the very bottom of the page and choose Light.See More. If your night light toggle above the link is grayed out, you may need to update your display driver.
To test the display, attach an external monitor and restart the computer. Windows 10 night light not working on external monitor Settings > Update & Security > Windows Update, then select Check for updates.