Make sure your phone, tablet, or computer and your Roku TV are connected to the same Wi-Fi network
Turn on your Roku TV
Enable screen mirroring on Roku by going to Settings > System > Screen mirroring
On Android, open the app or quick settings and tap Cast or Screen Cast
Select your Roku TV from the available devices
On iPhone or iPad, use a compatible app that supports AirPlay or casting
On Mac, use AirPlay or a compatible streaming app if supported
On Windows, press Windows key + K and select your Roku TV
Open a streaming app that supports casting, such as YouTube, Netflix, or Disney+
Tap the Cast icon in the app and choose your Roku TV
Start playing the content you want to watch
If the TV does not appear, restart both devices and check the Wi-Fi connection
If needed, update your Roku TV software in Settings > System > System update