1. Check if all network cables are properly connected and secured.

2. Restart your modem and router device.

3. If you are using wireless network, check that you are connecting to the right Wi-Fi network and that your Wi-Fi password is correct.

4. Visit the network settings on the TV and make sure that the correct network is being used.

5. If you are using a connected device such as Apple TV, make sure the device is properly connected to both your modem and your TV.

6. Contact your Internet service provider to ensure that the service is running and that there are no network outages in your area.