Just got a new LED TV and need to hook it up with my old (2 yrs is old I guess) reciever. The reciever does not have HDMi (?) connections, so a guy at best buy said all I needed was a fiber optices audio cable from TV to reciever and good to go. Hooked it up and on some channels (local stations, not cable)there is no sound. Flip to others and the sound is perfect. What gives? Will I get the most out of this TV with my old reciever or should I upgrade as well? The HDMi single cable connections that my TV has seems very simple and nice! Was told it is better saound quality as well.