For some reason, the 'Guide' (where it lists all the TV programs) is currently only showing the 4HD channels (BBC1 HD,BBC2 HD, ITV HD and C4 HD) in the guide (plus adult channels and radio). That is, other mainstream channels like Channel 5, ITV 2, E4 etc are not showing in the listing.
Can someone please help me understand why this is happening and how I can solve it. This has happended once before and then after a day or so returned to normal. I have already tried retuning the box but I still only get 4 HD channels.