What the 404-error message means is that your TV is unable to connect to the internet on your existing Wi-Fi networks. There are many reasons this problem may occur, starting from problems with your router/modem/MiFi device.
If your router or Internet source is working just fine, then TV software issues are the main cause of 404 and other Wi-Fi unavailability errors. Follow our detailed guide to rectify all possible TV not connecting to internet issues.