I just moved into a rental home where the owner had set up surround sound. She ended up leaving the wall-mounted flat screen TV along with the A/V receiver, wall mounted speakers, subwoofer, DVD player and CD player since she said it would be more of a hassle for her to remove it. I am really grateful for her that she left all of that but am completely clueless on how to get it to work properly. I tried to play a DVD (changed TV's input to DVD, turned DVD player on (with DVD in), and pressed play). Nothing happened. I could see the time lapsing on the DVD screen but saw nothing on the TV. When I asked her for advice, she said I need to get Comcast cable for it to work and that the wires are all color coded to make it easy to set up.
Do I really need to order a cable box to use the TV and the surround sound even to play a DVD? Am I missing a key piece of equipment? It doesn't look like there are any loose wires behind the equipment.
If this helps, here is the specific devices:
AV receiver: Denon AVR-1802
DVD Player: Sony DVP N5700P
CD player: Sony CDPC211
TV: Panasonic Viera (not sure of the model number but can find out if it's important)