To use an iPad as a second screen on a Windows 10 computer, you'll need to use a third-party app like SplashTop.

Here is how to connect a Lenovo ThinkVision monitor to a Windows laptop and experience two screens. Check ports on your laptop & monitor Make the connection Connecting to dual ThinkVision via USB-C ...

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 ...