Samsung is a sponsor of a great site,www.wirewize.com. You enter what components you have, and wirewize tells you how to hook them up. The problem you're having is described in your MANUAL under "selecting the source." You can choose ONLY those external devices that are connected to your TV. Another thing you'll run up against...you'll have to run an optical cable from tv to receiver to get 5.1 surround when you have your dvd player connected.