Have had my box running for 4 days now. Cannot hear the fan unless I get right up to it. Picture is sharp in HDTV. Installer said my Mitubusi 65 inch wide screen diamond vision was better then the Pioneer Elites he has been installing. My serial number is in the 4700 series. The picture on direct TV channel 199 and 509 are crystal clear. I am glad I chose the Sony over the Mitubushi box. Will keep everybody posted.