Where would that second HDMI cable go exactly?
Where else besides a receiver would you want to connect it?? <stumped by that one>
ARC should technically work, although even though both devices support the ARC, that doesn't necessarily mean that it will work (not what you wanted to hear, I realize.) Add apps on a 'smart' HDTV to the mix, and practically all bets are off per se. ;(
Double check the model number of the HDTV again so I can look it up though.