Cable box signal to receiver and to tv

Although it seems strange when you have a 7.1 channel receiver/surrounds to improve your sound quality, you should have at least one option for TV speakers only on demand. You might have to pick up a few extra types of cables to see which type sounds/looks better.

Try the following connections (although it may vary since I don't know the actual audio outputs of your cable box (make/model?). #1 & #2 or #3

#1 For HDTV picture & HDTV speakers:
Comcast cable box (Component R/G/B out) --> (Component R/G/B in) Sharp LC-52D92U
Comcast cable box (Composite Red/White out) --> (Composite Red/White in) Sharp LC-52D92U
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#2 For surround:
Comcast cable box (HDMI out) --> (HDMI in) Sharp LC-52D92U
Comcast cable box (digital optical/digital coaxial out) --> (digital optical/digital coaxial in) Sony Sony STR-DG920

OR

#3 Comcast cable box (HDMI out) --> (HDMI in) Sony Sony STR-DG920
Sony Sony STR-DG920 (HDMI out) --> (HDMI in) Sharp LC-52D92U

Just mute the HDTV speakers as necessary .

hth,
Pedro

I send my HD satellite to the TV via HDMI, and from the satellite receiver I use the optical out to go to my Denon receiver. I can watch the news or whatever with the TV speakers, and crank up the Denon for "special" shows.