Here is a list of steps and tips to troubleshoot why your internet is not working on your Smart TV:

1. Verify you have a valid internet connection and a strong signal.
2. Power cycle your modem and Smart TV to clear any connectivity issues.
3. Ensure your modem and Smart TV are connected to the same Wi-Fi network.
4. If using wired connection, check that your Ethernet cables are properly connected and active.
5. If using wireless connection, check software/firmware versions and updates.