I have a ln46a540p2fxza and I have the Digital Output - Optical - connected to a Panasonic Home Theater System (HTS).
I'm not using a Soundbar, but the Digital Out works FINE when the TV is set to the PC as the source, but not when it's set to TV.
I spent 30 mins online w/Samsung Chat and they want me to do a Factory Reset, which I might try later.
Any feedback before I go to that extreme?
My HTS has an RCA/Composite Audio In, and the Samsung TV has an RCA/Composite Audio OUT, so I hooked that up and now it works- Sound plays from TV thru HTS.
And my PC works thru that option now as well, so I only have to deal w/one connection.