I just purchased an Onkyo TX-NR414, and I'm generally delighted by the features and performance for the price. I've successfully hooked it up to my blu-ray player, my speakers (left, right, center, subwoofer), and I now have a dongle through which I can stream Pandora, Internet radio, etc. So far so good. But for the life of me I can't get the sound from my television (a SHARP 37-inch) to play through my external speakers. I've followed the instructions in the online manual, installing an optical cable from my TV to the receiver in addition to the HDMI cable, but nothing works. I think I am missing something quite basic, and will accept any mockery this post inspires, as long as I get some practical advice. Any suggestions?