Do check it's definitely HD, as some early ones had the DVI connection - and nothing behind it !!
The easiest way to check is to go into the Connections Menu, select STB(DTV) then follow the set-up process until it asks DVI/HDMI - YES/NO which will be the option at the bottom of four listed (sorry, can't quite remember the exact wording but you get the gyst). If it's not got the HD scaler fitted, it won't ask the question..
Lee
BeoWorld - Everything Bang & Olufsen