
If necessary, make sure to switch ports to see if that fixes the problem connecting to the second monitor.

The problem could be an issue with the input port in the monitor or output port on your device. If this is the issue, make sure to check your display manufacturer support website to find out how to apply the latest firmware update. Sometimes, if you're trying to use an HDTV or a particular high-definition display as a second monitor, you may need to update its firmware to fix bugs or compatibility issues. If you're using a monitor with multiple inputs, make sure to select the correct input.

Try a different cable, as the problem could be a bad cable or pin in the connector. Before changing your device settings and updating drivers, make sure you first cover the basic troubleshooting steps:Ĭheck the physical cable connection from the display to the video port on your desktop, laptop, or tablet.
