Question about Harman Kardon AVR 340 Receiver

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Static or hiss noise

I have a new unit that was bought on a buyout not sure if warranty would be avaialble. It appears to be a simple problem with the unit. The unit comes on and the display appears to be normal but when the amp comes on the speakers are hissing or sounds like a radio station without an antenna. No matter what input you select the sound output is the same.

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Re: Static or hiss noise

I have the same problem. Only one speaker is hissing and only for analog sources. No hissing when I select Coax.

Posted on Nov 23, 2006

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Hi i am having problems with my lg home theatre system. The front right speaker will every now and then make a loud distortion noise like static and its annoying. I,ve tried new speaker wire, new contacts...

First make sure all connections are firmly in place. Not only speakers, but any other inputs too.
swop the left and right channels over at the amplifier end. If the sound happens on the other speaker now, you have a faulty av receiver. If it's still on the same speaker, that speaker is "broken" and requires replacing.

Jan 14, 2011 | Audio & Video Receivers

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No sound from my new (refurb) onkyo receiver

First of all, be sure the volume is down fairly low so that you don't blow the speakers or the unit itself if and when the sound suddenly comes back. I've repaired many units whose owners turned them way way up to try to hear something, then flipped off a tape monitor or mute switch and got blasted. No sound with any input? (tuner, CD, etc.) Do you hear ANY noise or hiss from the speakers at all? I hate to ask, but are the speakers and inputs connected properly? On this model, the jacks are not set up beside each other as they usually are. Instead, the left channel speaker and input jacks are above the right channel jacks. This can be confusing! Are the speakers actually selected? The proper speaker select switch (below the power switch) must be in the down position. Is it possible that someone left a headphone adapter plug in the headphone jack? You know, the kind that allows you to use headphones with a 1/8" plug in that 1/4" jack? This will cause the speakers to be shut off. If you don't have the owner's manual, it's at If none of this helps, the unit may have a problem and I would invite you to write back with more details on what you've tried, etc.

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Onkyo TX-SR606 power on default input setting and hissing sound

I had the same problem for more than a year but just lived with it. The solution is to reset the receiver to factory defaults. Page 96 of the owners manual, "turn the unit on and while holding down the VCR/DVR button, press the ON/STANDBY button. CLEAT will appear on the display and the unit will turn off". Problem solved!

Sep 21, 2009 | Onkyo TX-SR606 Receiver

1 Answer

TX-SR803 with no sound or popping hissing on any input

It is common for a short term power surge to open up the internal fuse in the main power transformer. Without testing some components inside the unit, I really can't say for sure whether or not the unit is worth repair. I would suggest that you invest in a detailed repair estimate at an authorized Onkyo service center.

Keep us posted.


May 26, 2009 | Onkyo TX-SR803 Receiver

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Sansui synthesizer tuner T-909. Tuner keeps on going off-station and making a horrific static/hissing/white noise. Have taken a look inside, and replaced the crumbling leads into the pre-amp. There is some...

It sounds like there is a transistor that is breaking down because of heat. With the unit placed away from the amp, there is less heat. This unit needs a quick overhaul. If a tech can reproduce the problem, the use of a "freeze" spray will make finding the problem transistor easy. Figure on $5-$10 in parts plus the local labor rate for the total repair.


Sep 12, 2008 | Sansui Audio & Video Receivers

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Marantz SR-7200 Goes to pure static and volume spikes

If the noise is not present in Direct or Pure Direct mode it is definitely associated with digital circuits.
I assume, the unit is not under warranty. Open it and inspect connections to and from digital board. If this does not help it might be faulty connection on the board and it is better leaveing this to a specialist. I hope you did not fiddle with the service menu?!

Apr 26, 2008 | Marantz SR-7200 Receiver

1 Answer


hi mate, ive had the same problem before with this amp. i bought it new aout 6 years ago and bought another new one about 1 year ago, new, for £70!

on the first amp there was a problem with the surround sound aspect, it kept overloading when turned up even a fraction, it would tick 4 times and power off. Eventually the surround sound stopped working all together and whenever selected made a VERY VERY loud hissing/crashing noise through all my speakers, blowing one of them, SO BE VERY CAREFULL.

when that happened i assumed was broken so bought another one, and had same overload trouble when i got a new speaker package.

Im pretty dam sure it was the ohmage ratings being different on 2 of the surround sound speakers that srewed the 1st one, so id suggest you check theyre all ok, as well as the speaker watt-age.

what are the specs on all your speakers (ohms and watts RMS)??

do you listen to LOUD music through the 5.1 option??

hope this helps, if all else fails buy a new one mate, theyre so cheap. go into panasonic shops and see if they have any left.

Apr 23, 2008 | Panasonic SA-HE7 Receiver

1 Answer

Volume high but no sound only a very low static sound

Make sure the unit is not swiched to tape monitor. Check to see if all inputs and outputs are wired properly. Unplug unit and let it sit unpowered for a half hour to reset micro-processor which may have locked up. When you power it up again, listen for click of speaker relays. Make sure to turn volume down BEFORE you power up. If none of these work, take unit to pro tech for check up. It just might be a simple fix, cheaper than replacement. Good luck.

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Statics and hissing...

I also have the same fault, The static noise is coming out
of ic720 [ cs4391 or cs4392 ]on digi pcb which is D-A converter
this ic maybe faulty, i have ordered a replacement ic and will
post here if solves problem

Dec 10, 2007 | Marantz SR-5200 Receiver

1 Answer

No sound from my brand new speakers

I am assuming you have tried new speakers on used unit on both A & B choices. Have you tried your new speakers with old 2802? If they work OK with old unit, you have problem with amplifier in used unit. Take the used 2802 to a reputable shop and have it thoroughly tested. Perhaps it is just a loose connection.

Dec 12, 2006 | Denon AVR-2802

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