HK avr-25 - everything seems to work except sound is not being amplified. What could be the problem?

If the sub is working fine and everything is how it should be, then it looks like the pre-amp for the sub channel has failed.

Its the same yes. The pcb assembly is the common term for a ''board'' in electronics terms.

Hi,

You seem have a problem with a component in that channel, the bad news is that it is hard to fix that type of problem (you would be better off if the channel died). All of the components in the final output section are part of the same audio loop (per channel), which makes it hard to find the faulty part.

Sounds to me like a bypass or coupling capacitor is faulty or need to be re-soldered, either way to fix this problem you should take it in to a repair shop.

I hope that helps and sorry for the bad news.

Hi...
What are you running thru Video 2?
Have you unplugged the AC cord and re-powered up yet?
Thanks

Hi, your analysis are right, your speakers has no problem, the problem is in your receiver.
there are several factors that affects it, try some troubleshooting: and answer this questions:

1. During this event, what is the source of your INPUT audio signal?
Have you tried to replaced your RCA cables that connected to the source of your receiver?

If YES, then problem really exist in the internal system of your receiver. may be you have overdrive your receiver unintentionally, which cause the Power Amplifier to malfunction,

On this event, I would suggest that you bring your receiver to it's Service Center for repair,
This problem needs technical troubleshooting of a qualified technician.

HK AVR 347-I took it back- everyone was frustrated and the verdict was that it just doesn't work. I have a Dennon now and it doesn't sound as good as the HK but it works most of the time. Not sure it the Harmony is the problem. I'm reading the Dennon manual now and it seems the Dennon remote can do what the Harmony is trying to do. Harmony support is awesome and we'll keep trying. Sooo- was there a trick to it?

Are there any MUTE or Tape Monitor buttons pushed in?

thats not good power transformers in it went bad do u have it on a nice power strip or direct to wall

I had the same problem, unplugged the receiver for 5 minutes, then when I plugged it back in, it worked.

first isolate trouble by giving audio signal to your power sub. by your finger.you know when we put our finger on input signal the noice is amplified and you can listen sound.if nothing is noticed on sub that menas sub has problem.