Question about Panasonic Home Theater System System

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Panasonic sa-ht700 When turned on whether watching a movie or just cable tv, the unit will emit a loud pop then a loud piercing noise. The only way to stop the noise is by turning it off. I then turn it back on and it will only work properly for 15 to 20 minutes before the same happens again.

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  • Anonymous Aug 13, 2008

    I have the same problem and you're right there seems to be no bass playing either. The entire sound has changed on the unit. So if anyone knows anything about it, let us know.

  • chacollins Aug 16, 2008

    we have been having the same problem for about a year.  It will happen even if the tv & cable box is off.  If you leave the power on to the receiver, it can start making the noise anytime. HELP!!

  • jhleandrae Oct 11, 2008

    When turned on whether watching a movie or just cable tv, the unit will emit a loud pop then a loud piercing noise. The only way to stop the noise is by turning it off. I then turn it back on and it will only work properly for 15 to 20 minutes before the same happens again.

  • Anonymous Nov 17, 2008

    my unit will play for about 3-4 days, then wont work for about 3- days, then will work on and on for about 6 months. Did somebody say the board on these units have a problem.

  • Anonymous Dec 22, 2008

    I Have this same problem with my SA-HT700 and it will do this after just being turned on.So, NO leaving it on for a long time is NOT the problem!!!! It is so loud that it is deafening. I also took the cover off to find NO DUST! I think there is diffidently something else wrong here.

  • qtee71 Dec 22, 2008

    I have this same problem with My SA-HT700 and it can happen soon as I turn it on. So...NO leaving it on for a long time is NOT the problem! The sound is deafening. I have also removed the cover the clean it up only find NO DUST!!!

  • bikerduff Jan 03, 2009

    Somewhat the same issue. Only when watching DVD's..1/2 to 3/4's of the way thru a movie it loses video and we get loud resonant "humm or buzz" from Sub.

  • mustang2b1 Jan 30, 2009

    Exact same problem. Some times it works for two days after turning it back on, sometimes it works for two minutes before the high pitched hum comes on.

  • sharpiejeff May 12, 2009

    I have the same problem.  It makes a crack/pop noise and the goes into a high-pitch deafening noise until it is powered off.  But then seems to be fine for a while after turning it back on.  Does anyone know anything specific that could make this happen.  How did the fan thing work out?


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Usually problems that start "out of the blue" after being powered-up for hours, caused by heat building up are due to things inside getting hotter and hotter until they fail. Unless something actually burns up, this is a reversible problem. Shut it down to allow it to cool off, and it works again. I own a SA-HT700. After 24 hours or so of being powered-on. it starts making a loud rumbling noise. Turning it off for 20 minutes fixes the problem. There's a fan on the back of the unit. It does not work. The heat sinks inside my unit are not covered with dust - suggesting the fan has never worked. I rigged an external DC supply to the 12V fan, so now the fan runs all the time. I am waiting to see if this fixes the problem.

Posted on Nov 20, 2008

Same bro and its happening when there has no bass

Posted on Aug 12, 2008

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