Question about Sony STR-K840P

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I have a Sony STR/K840P and since moving and installing we can only hear music or background noise but very poor foreground and voices. This is on fibre optic or coax on set top box or PS3. Suround blue indicater can be on and still poor sound. Please help Ive tried all settings and its driving me made. Regards Adam Roache

Posted by Anonymous on


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6ya staff

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Posted on Jan 02, 2017



  • 1 Answer

SOURCE: sony str bd-930 connected via digital input to ps3,no sound..

on the ps3 in audio options you have to set it so that the sound is going through the optical and not the hdmi. this it was I think the problem is.

Posted on Dec 30, 2008


David Dunn

  • 8546 Answers

SOURCE: Sony DG510 - Not Getting surround sound out of Cable

Did you try it on BOTH the SAT and Video 2 optical ports? Still not working? Could be the Optical cable is bad.

Does your Cable Box also have a coaxial digital ouput? It looks just like a standard RCA connector but says Digital somewhere near it. Try one conductor of a standard audio cable from it to the "DVD" coax connector. Select DVD to hear it.

If it still doesn't work jump into the Cable Box setup to make sure it's output is set up properly.

I would recommend using the coaxial digital option if you have it.
1) The cable isn't special or expensive like the optical cable is; a garden-variety RCA cable works just fine.
2) You have virtually unlimited distance to work with in the house.
3) You don't have to be so darned careful with it as with optical.

Posted on Apr 03, 2009


  • 1 Answer

SOURCE: I have my 80 gb PS3 hooked up to my STR-DH800. I

if you have the old fat ps3 it will only output linear pcm through hdmi.if you have the new slim ps3 it will output the true hd and dts master audio through hdmi.there is nothing you can do about it as far as i know.i hoped sony would fix this but so far they have not

Posted on Jan 30, 2010


  • 128 Answers

SOURCE: Hi I have a STR-DN1000

Your connections are fine the issue here is with the onboard processor.

HDMI is a great connector ONLY because it simplifies wiring.

The "concept" was to give consumers a simple way to connect their components while allowing devices to "communicate" to each other by being able to send control signals through the same cable.

HDMI is a digital format which has advantages but unfortunately these signals must be processed by the receiver, the problem that arises is that dvd players, video games etc. generally do not encounter issues when connected directly to a television but once you route that signal into the receiver well that a whole new ballgame there. (you are adding processes to the signal)

The delay and popping are caused by the processor making the needed adjustments and "reading' and converting the signal for display.

Personally I use HDMI but I also connect the optical AND component cables, Why? well for starts you can "upconvert" to HDMI but not "downconvert" so if you need a analog signal for a dvd burner s-vhs recorder or ? the HDMI signal can't be converted to a lower quality (for copyright reasons)

If you are not using the receiver for video switching or for multi room you will get a better picture by bypassing its video capabilities.

On low or mid line receivers such as your Sony I would run the hdmi's to your HD monitor and run the optical cable to your receiver.

Yes this will mean you will have to switch 2 inputs when changing sources (tv and then receiver) but should give you quicker video processing and better picture.

Now I don't want you or anyone to think "oh my Sony sucks" as its not entirely Sony's fault HDMI through ANY receiver brings issues I have a $2000 Denon and the HDMI sucks on that too!

I did write an extensive article/post on HDMI processing about a year ago its somewhere on this site.

Hope that helps

Posted on Sep 23, 2010



  • 14 Answers

SOURCE: What are the steps to

Here is a link to the manual for your receiver:

Posted on Sep 24, 2010

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