Have 42 lcd tv and can't get any channels using only an s-video cable connected to my direct tv box. Need hdmi

Do i need to buy hdmi cables to get the channels? The HD receiver box is being installed on Friday Also ,the screen suddenly now opnly plays dvds black and white. I didi hook up the s-video cable to dvd player, and can play dvds Did i get a lemon. It's a brand new LG lcd flat panel. Thanks for helpiong me.

First thing, ditch the S-Video connection. You won't get high def over it anyway. When the HD box arrives, connect to it using either HDMI or COMPONENT (Y/Pr/Pb) cables.

You say that the DVDs are playing black and white, but play find over the S-video. What connection are you using that they play black and white. If you connect the "video" output of your DVD player to the "Y" connector of your TV's COMPONENT video, you will get ONLY luminance, so this will appear to be black and white. Make sure you are connecting the set according to the user's manual.