So I just got a KDL-48W705C. I love it but... when I'm on an HDMI input (Sky+, basically) none of the set's own onscreen menus work - so pressing Options does nothing, for instance. Switch to Freeview or Component and all this works fine. Am I missing something obvious? (And no, the Sky box isn't plugged into the HDMI MHL port - so that solution isn't for me. )