Question The back light of monitor is always on.

[Junx]

After I re-installed Windows 10, the back light of monitor is always on when the display is turned off by system or the system sleeps.

No hardware is changed.

When the system is shutdown, the back light is off as normal.

The brand is MSI and the graphic card is 3070.

I updated drivers for motherboard and graphic card but the issue persists.

Any idea? Is there any setting that controls the back light?

 

[Ralston18]

Update your post to include full system hardware specs and OS information.

Make and model monitor?

Some monitors have drivers that can be installed on the host system. Check the applicable monitor User Guide/Manual.

May be some monitor configuration setting.

 

[boju]

What's your system specs and monitor?

Usually when monitor sleeps or stops receiving a signal the power button led indicator changes colour. What's actually happening?

 

[Lolomid]

Press Windows key + X
Click Power Options
Under Related settings
Click Additional Power Settings
Click Change when the computer display turns off
Click in the list box and choose when you want it to turn off
Click Save changes

Additional steps you can take that might be helpful.

Press Windows key + X
Click Device Manager
Expand Display adapters
Right click the current display adapter
Click Properties
Click Driver tab
Click Rollback driver if the option is available

If not
Right click the current display adapter
Click Uninstall
Check the box that says, "Delete the driver software for this device.”
Exit Device Manager
Restart