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Harmon Kardon AVR220 Humming noise

My reciever has a humming noise (much louder when unit is firt turned on, then nearly goes away). The humming does not get louder with increase in volume. A few years ago I was dumn and had it wedge in-between two shelves, it would turn off if we had it on for long periods(obviously it was over-heating, but I wasn't smart enough to figure this out before it caused this problem). Am I out of luck or is there a repair possible? Which part of a recieve would a humming noise be coming from?

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The most frequent cause of a "humming noise" in electrical components is called a "ground loop". If you want an indebth discussion of just what this is, you may go to this link:

http://en.wikipedia.org/wiki/Ground_loop_(electricity)

If, on the other hand, all you want to do is stop the humming, you may be interested in the discussion here:

http://forum.ecoustics.com/bbs/messages/1/130397.html#

No need for me to reiterate all that is said in the above discusssion. Try all of the suggestions made. Good luck.

FixYa is having some problems with internet links so you may need to copy and paste the links into your browser.


Hope this helps.


Posted on Oct 04, 2009

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