Connect both devices to the same Wi-Fi network
On Windows, open Action Center and select Cast or Connect
On Mac, use AirPlay from the menu bar
On the TV, enable screen mirroring or casting mode
Use an HDMI cable to connect the computer directly to the TV
On the TV, select the correct HDMI input
Open the video, photo, or app you want to stream
Use Chromecast or a similar streaming device if your TV does not support casting
Install the required streaming app on your computer and TV if needed
Adjust display settings on the computer if the screen does not appear correctly