Disconnect the signal cable from both ends, wait about a minute, and reconnect it again firmly.
If the monitor does not show up in the settings, try these steps before changing the configuration settings on Windows 10: When the desktop or laptop does not detect the second external monitor, it could be a problem with the software, but it might also be an issue with the physical connection. How to fix external monitor connection issues via hardware troubleshooting VPN Deals: Lifetime license for $16, monthly plans at $1 & more
