I am trying to use my xbox component cables to get an HD picture, but the problem is when I do I get no sound at all. The tv I have is an 18.5 inch Coby TV: http://i242.photobucket.com/albums/ff94/dumboy234/IMG00053-20110119-1651.jpg (view of the ports on the back of the TV) The cables I have plugged in are green, blue, and red on the bottom row and the white and red on the top row. I get perfect picture but no sound (on the YPbPr TV mode)! But if I were to connect the yellow wire and switch the TV mode (AV TV mode)I do get sound but the quality is kind of blurry. And if I connect either the white or red cable into the slot that says audio in, I still get no sound. I had to push back the the prongs that surrounded the the middle piece so it could fit into that slot. Anyone know why this happens?