you’re free to use a second monitor on your Windows 10 computer to make your work easier.

Now, you’re able to read this post to get some useful solutions.

If so, do you know how to fix this issue?

In this post,MiniTool Softwarewill show you some effective solutions.

you could try them to help you out.

How to Fix Second Monitor Not Detected/Second Monitor No Signal?

you might update or reinstall the gear driver to have a try.

Update the Graphics Driver

After these steps, the issue should be solved.

This software has a trial edition.