I have a digital optical from my ps2 to the receiver. Do I have to use componet cables now? The reason I ask is I was messing around last night and I hooked up my monster cable s-video from the ps2 to the receiver and just left the L and R audios unhooked. I wasn't getting any sound until I plugged in the L and R audio wires. I thought by running it like this it would work. The digital opitcal setting is turned on in the ps2 menu.