Originally Posted by DSperber
HDMI2 is for ARC, to send digital audio from VT50 to AVR via HDMI. Connect your AVR's HDMI output (i.e. input as well) where ARC is supported to HDMI2 of the VT50 (where ARC is also supported). Check your AVR's manual for how to enable and use ARC (audio return channel) for handling audio from TV.
As far as turning off TV speakers, All settings -> Audio -> Advanced audio -> TV Speakers -> ON/OFF
You can also connect an optical cable between your display and your receiver if you don't have an ARC feature in your receiver.
Samsung 64F8500, Panasonic 65VT50, Oppo 95, Tivo Roamio for OTA, Dish VIP722, Marantz AV8801 preamp, Rotel Amps, Atlantic Tech 8200 speakers, Seaton Submersive HP, Calman 5, Chromapure, Accupel DVG-5000, VideoForge HDMI II, i1Display3pro, i1pro2, eecolor colorbox.