The HDMI port on your motherboard or GPU usually connects to your primary monitor. If you're using a relatively new graphics card and monitor, your HDMI port is probably vacant, considering many ...

To detect a second monitor manually on Windows 10, use these steps: Open Settings. Click on System. Click the Detect button to connect to the external monitor under the "Multiple displays" section.

HDMI 2.1 was supposed to herald a new age of widespread high-bandwidth, low-latency, and lossless media consumption. As far as monitors are concerned, however, that promise hasn't really panned out.