Before you attempt to mirror to a TV, be sure the TV and the laptop are connected to the same network. Can't go wireless? Connect the HDMI cable to your laptop and your TV. MacBooks can use an adapter ...
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 ...
I have a Dell U2720Q monitor that accepts HDMI 2.0, DisplayPort 1.4 and USB-C. I use USB-C because the monitor acts as a hub for a range of peripherals (keyboard, mouse, webcam, speakers, etc.etc) and ...