Hi, I get something very odd happening on my KDL-40W4000 when I retune, it scans to 93 channels then drops back to 72 channles eventually ending up with 102 but missing all the BBC channels.  Signal strength on the channels I do have is high.  The other TVs in the house (Toshiba & Sharp!) are all perfectly fine and get 139 channels.  I have tried a factory reset and retune but its just the same.  Does anyone have any ideas?