Yamaha HTR-5660 receiver but no surround sound

Question edited for clarity.

see if the video for the 5640 works.

https://www.google.com/search?q=Yamaha+HTR-5660+reset

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hi see the link .thanks

HTR 5660 How To Reset Yamaha

The signal that comes from most tv's via the optical output is a stereo signal only. That is what your receiver is reading. You would have to manually set your receiver to decode the signal into surround,.

"200 watt speaker" is meaningless. What brand and model? Be advised that stripping parts from an all-in-one audio package for redeployment with 'standard' audio components doesn't guarantee compatibility or safe function.

Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Yamaha-HTR-5660-Receivers-manual/id/394ci074/t/2/

The amp has selectable impedance. See page 16.

You must have hit the DIRECT button . In this mode it produces pure stereo sound by shutting down the multichannel Digital Sound Processor (DSP). Only your front Left & Right speakers will work

I solved the problem by ensuring the Impedence selector was either all the way to the left or all the way to the right, as instructed in the manual.

First, the sound source must also be in DTS. DTS is typically not the default audio selection on any DVDs that have that format...you'll have to select it.

is the yellow video cable in the right input at the rear

Looks like you've got the best connection available - initially I thought it might have something to do with decoding the prologic signal from the analog input, but obviously not! And since you've got the audio separate from the video it is unlikely there is any interference from the video signal in the cable. Have you tried a different DVD player (I reckon that is most likely)? Also try connecting the video signal DIRECTLY from DVD to the TV if you aren't already doing so (you are anyway aren't you - the HTR 5660 doesn't have HDMI out does it?) Finally, if you have some spare cables around, try changing them - see if you get the same response when using component video cable instead of HDMI.

Try changing your cables