Hi, I have just purchased a SH Sony STR-KG700 receiver and am having no luck getting sound through hdmi. The unit is connected to a Soniq tv (model s55v16a). I have a connected hdmi and toslink cables and get picture but no sound. Have tried different cables and still no luck. I can get sound when the receiver is switched to radio so I know the connections to the speakers work. Any tips or advice would be greatly appreciated. (Hoping I haven't brought a lemon). Thanks