If Windows cannot detect the second monitor after waking up from Sleep mode, then here some working solutions to help you fix the issue.

A dual-monitor set-up can help to increase productivity, but what if your second screen isn't being detected? Here's what to try to fix the problem.

Now, on the right-side pane, find Multiple displays Click on the Detect button under the heading Multiple Displays. Windows should automatically detect other monitors or displays on your device.

Here's a quick guide to setting up dual monitors for your gaming PC.