Continous Buzz/Pulse from speakers No other sounds come out

That might be the woofer itself in the subwoofer, or the ampliifer.

 

5 year warranty on the woofer, one year on the electronics.

 

The woofer can be removed and checked; it should be about 3.4 ohms DCR.

 

Other wise,

 

To find the authorized Harman kardon service center in your area:

 

• Go to: www.harmankardon.com
• Click on United States
• Click on Support at the top
• Click on Find My Product
• Enter your Model Number or Select your Product from the drop down list; then  SUBMIT or SEARCH
• On the list on the left side, click on Service Center
• Supply your zip code at the next screen, then FIND
• A list of service centers in your area will come up.

You need a good electronics repair man who understands old valve amplifier and light cell systems

Is this only with CD, only with THAT CD, or with nothing in particular selected or playing?

Check all connections for tightness as bad cable shield connections will let emitted noise into the system. Ditto for signal or speaker cables routed near power cables, TV's, other electrical sources.

Sometimews reversing the AC power cord polarity can resolve buzz/hum.

Sometimes, an electronic pulse can cause this protect mode. this can come from an electrical storm or, bad circuitry in the home. Unfortunately, you may have to repackage and send back to the manufacture for repair.

If you're saying you hooked the Bose speakers directly to the Yamaha's amp instead of the prescribed way through their own bass module - they're cooked.

Hello, you can verify that your receiver is working or not. When you are playing a dvd unplug the audio RCA plugs (red and white) from the back of the Sony dvd player. Touch the tips of each of the RCA plugs with your fingertip. You will hear a buzz sound coming from the speaker associated with the plug if the receiver is working\ i.e. touch the red RCA plug tip and the right speaker will hum...touch the white tip and the left speaker will hum or buzz. This will not hurt your system or speaker. If you do not hear the hum turn the volume to 3 or so and wet your fingertip and tap the tip of the RCA connectors. You will hear "pops" coming from the respected channel. I believe your cd\dvd is at fault. Good Luck!

barneyluc

I bout mine used an it has absolutely no problems you probably got one that they knew wasnt really working in the first place.

Maybe the speakers are no good. Have you tried hooking up a different set of speakers?

Make that 3. There must be some kind of date chip in the thing

It sounds like a capacitor in the power supply is just about to die. With the power disconnected have a look at the large tin can looking gizmos near the power transformer. There could be a couple of them. Leave the unit switched off for a while before going near them they could still pack a splat. Replace them with the same value and make sure they're connected the right way and it should solve your problem. Whilst in there have a good look for any other smaller capacitors which look as if they're getting rounded at the top. Replace them too. Either that or dig deep and buy a new one.