They'll walk you through firmware version checks, settings and resets. If the model is bigger than 32 inches they send out repair here (USA.)
My wifi connection with my Samsung Smart TV shows to be correct but I experience "no sound" even after having re-installing all sound settings on both my DSTV Explora and smart TV as well as router settings of both WPS and Ethernet cable. What could still be wrong?
Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic