2. Make sure your TV and screen casting device (such as smartphone or computer) are connected to the same Wi-Fi network.

3.Press the "Menu" or "Settings" button with the TV remote control to enter the TV's settings menu.

4. In the menu, find "Network & Connections" or a similar option and select it.

5. In the "Network & Connectivity" or related settings, look for the "Cast Screen" option and select it.

6. Once the casting function is enabled, the TV will enter standby mode, ready to receive the casting signal.

7. On your casting device, find and turn on the appropriate casting function, which may vary by device type, and can usually be found in the device's settings or control center.

8.Select your TV as the casting target, most TVs will display a code or name at this point for identification.

9. Once the connection is established, the content of your casting device's screen will be displayed on your TV. Different brands and models of Smart TVs may have slightly different setup steps, so if you encounter difficulties during operation, you can refer to your TV's user manual or contact the manufacturer's customer service for advice.