I'd call it in, get it fixed by Samsung.
As to the others, you have to configure everything to stereo, PCM and then it might work.
I have a Samsung pn60f8500 that I watch Netflix , amazon , and acorn on. when these are selected I can only get sound through the tv speakers. when I watch directv , I can hear sound through my external speakers. I have only analog audio out on the tv as my optical is broken( bought tv as a floor model). currently I have directv receiver in hdmi 1 , then the audio from receiver is connected to my stereo receiver. do I need to connect analog audio from tv to directv receiver as well ?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic