HTTP 404 says the requested resource was not found at that address. A channel URL can change or disappear while the account remains valid. First distinguish one missing resource from a whole service that cannot be reached.
Refresh the catalogue once
Use the player's supported refresh function to retrieve current entries. A favourite may still point to an older item. Search the refreshed catalogue before deleting the entire account profile or resetting the television.
Check the scope
If only one channel returns 404, report its displayed name and the approximate time. If every request fails, verify the server address and any migration notice from the provider. Do not guess new endpoints based on a competitor's website.
Keep useful favourites
Avoid clearing everything as the first step. Record which entries fail and whether the current catalogue offers a replacement. A missing source needs provider attention; extra home-network bandwidth cannot recreate a resource that the server does not supply.
