To solve your connection issue, it’s best to check a few things:

1. Make sure your modem router is set up correctly and is turned on.
2. Ensure that the Wi-Fi in the home is strong enough to reach your Smart TV.
3. Connect the Smart TV directly to the modem router if possible with an Ethernet cable.
4. Check if the Smart TV is using the correct recommended settings for the internet.
5. Check if any firewalls or anti-virus/security software is blocking the connection.
6. Try restarting the modem router and the Smart TV. Restarting devices helps reset any connectivity problems.