Question about Sony DAV-FC7 System

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High-pitched sound when using surround sound

Sound is good when playing DVDs and CDs but makes a high-pitched squeal when switching to surround sound on TV.

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  • moto1101 Mar 03, 2008

    Good sound on system when cds or dvds are playing. However a high pitch sounds emits when surround sound switched to satelite tv.

    Only suggestion obtained is possible capacitor in power unit?????

    Dream System is turning to nightmare after 4 years ez use.

  • Anonymous Apr 01, 2008

    Same problem: DVD, CD and tuner works fine but when the tv is on surround sound it emits a high pitched sound.

  • Anonymous Apr 10, 2008

    I had this problem. I (after some time) localized it as related to the FM / AM tuner funtion. By changing the FM station to one with excellent reception and then switching back to say Video 1 I could eliminate the whine. I also had to play around with different FM antenna connections on rear of unit to get there. Brad

  • sonystumper May 13, 2008

    Ditto to the above. After 4 years of good use, all of a sudden, I got the whine when viewing TV in surround. DVDS still have the surround quite clearly, but the Video 1 & 2 are like fingernails on a chalkboard. Will Try Brad's fix.

  • mpacker2 Jul 25, 2008

    Same problem, issued appeared for first 30 second when unit was turned on, now it is on all the time. Went to Video 2 no change. Intresting is that it bother my wife and I, but my kids do not seems to care.

    I have the Dream System disconnected presently and awaiting a solution.

  • Anonymous Jul 29, 2008

    I am having the exact same problem. High pitched squeal starting in first 5 minutes after switching ON. I called the Sony customer service and they are saying they are hearing this problem for the first time for this unit. Infact the customer service rep. was referring to the central defect database for this unit.

    This is the second problem with this unit. The first one I had was that the DVDs got struck inside and the unit will always go to Standby mode when I power off. So if I have to use this unit, I need to power off by pulling the electric plug off the outlet and the power it ON again.

    Anybody know of any place (like BBB) for complaining this kind of mass manufactured defective units?

    I was a great loyal Sony fan before this unit. I would hesitate to buy another product branded "Sony".

  • Anonymous Sep 23, 2008

    Same problem with the whine. Has anyone found a solution? Has anyone had it "fixed" at a service center?

  • abackstrom Oct 21, 2008

    Product Sony DAV-FC9 System high pitched whine System is 5 years old and it started about 2 weeks ago, found if you mutted the sound for 5 to 10 min it went away. Had the disc ejection problem also but Sont fixed it as it was under warranty.

    Will try Brad's idea and get a good reception on the tuner although I don't use the tuner much.

  • rmwttt Nov 19, 2008

    I have the same high pitched squealing sound from my sony dav-fc7 system which is there for minimally 10 minutes however, it is intermittent? If I disconnect the FM antenna it gets worse.......I did not see Brad's suggested fix...where can I find this?


  • Anonymous Jan 02, 2009

    Same problem... high-pitched noice when on video 1 or video two, but only when I am not watching anything on TV. Sounds great when it running, but you turn off the tv and leave on the stereo and after about 3 seconds, the noice starts.

  • bwalsh668 Jan 15, 2009

    I have the exact same problem on video 1 and video 2 but not on the other channels

  • Anonymous Feb 10, 2009

    I have DAV-FC, also with a high pitch whine on all inputs but dvd.

    However, when I can leave it on for a while (5-10 mins) the whine disappears.



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THANK YOU Guest (4/10/08)!!!
That was exactly what I needed! We have had our system for 4.5 years and suddenly, the FM feedback on everything, but DVD and Radio! Your fix helped. Once I set all my presets (at least the current one) to a clear station, the feedback stopped. Hallelujah!! We can enjoy this piece of junk once again! ;)
Amanda - San Antonio, TX

Posted on Oct 11, 2008

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I switched to the optical connection as well and that solved the problem for me. It is now working great!

Posted on Dec 27, 2008

  • Pat Burns Jun 23, 2013

    I have an optical connection from my TV to Sony Surround sound and sometims makes a high pitch squealing noise. Why is this?



Had this problem for over 6 months. Brad's fix worked for a couple months but then it started all over. So recently, I switched the connections from the analog cables to the fiber optic connection (had to get a different cable box) and the feedback is completely gone, works just like new.

Posted on Nov 01, 2008

Used to love this system, now i hate it the MOST! Never ever ever gonna buy any Sony products again, poor customer service and quality product!

Posted on Apr 19, 2008

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SOURCE: high-pitched sound when using surround sound

I had the same problem, check your wires on the back of the tv and make sure your, red, yellow and white wires are in the correct holes. What kind of tv do you have, as I have an Ilo, and it has like 15 different plugs in the back, you may have to get you book out and make sure you have it in the correct hole on the back of the tv... I hope this helps....

Posted on Jan 11, 2009

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