Ask an Electronics Question, Get an Answer ASAP!
Good afternoon, the manual for your sound bar can be found here.
Normally you would turn the TV sound off and just use the sound from the sound bar, as there is a short delay on the soundbar which converts the signal from the TV to sound, compared to the speakers built into the TV.
Your TV manual can be found here, I think you need page 37 which suggest you goto Menu > Sound > Speaker Settings, then change it to something other then TV Speaker.
Let me know how you get on.