Okay, all you need to get Audio from the TV to your Kenwood receiver is the Red and White cables, running out of the "Audio Output" jacks of your TV to one of the Video, Cable, or Aux. inputs on your Kenwood receiver. Go into the TV's menu under "Audio" and make sure that "External speakers", or " Fixed Volume Output" are selected to send the signal out to the Kenwood. Of course plug the speakers into their respective terminals on the Kenwood as well as the subwoofer, and select, the input that you plugged into on the Kenwood's Input selector to process the audio.
The back of the subwoofer has no line-level (plug-style input) at all? If not, the run wires from the subwoofer Input Left and Right terminals to the main speaker outputs along with the main left and right speakers in your setup.
Help, I can't get the back speakers ( Surround sound ) to work the front and center speakers work fine.
The rear speakers might not have any content in what you're listening to. Try going into the sound fields and select "simulated" or "Hall" or one of the other modes besides Dolby Surround. See if the rear speakers come on in one of the other modes. The rears only play a small portion of the audio, so it's possible there's nothing for them to play in the mode that you're in.
Okay, you need to use a different style of connection to get Dolby Digital to work (this could be why the surrounds don't work either). Does your TV have a Digital Audio Output, or an Optical Output jack on it anywhere? If so, you need to use that connection to get true Dolby Digital Surround sound. I did'nt recommend it because you stated you only had RCA yellow, red and white cables. Here is the link to the manual for your Kenwood, use one of the digital Audio connections I mentioned above and then set the input setting on the kenwood to digital. It's all in the manual:
Hello, No the S cable is for Video only- not for the Audio. Does the TV have a "Digital Coaxial" Audio jack (a.k.a. SPDIF)? If not, then you'll need to connect a cable box or other device that has a Digital output to get the Kenwood to play in Dolby Digital as the TV is strictly analogue and cannot send the right signal to decode.