A restart will refresh the settings on your smart TV without erasing any of your data.
Just unplug your smart TV, wait 30 seconds, then plug it back in. To restart your Wi-Fi router, unplug it, wait 30 seconds, then plug it back in too.
Check your Wi-Fi password Make sure you're using the right password and that you've entered it correctly.If you're still using a default password—it's typically printed on a label on the bottom of your router.