Audiolab 8000P - intermittent noise / disturbance from one channel

[dakku]

Hi Guys/Gals
I started to notice my Audiolab 8000P outputting some intermittent noise / disturbance from one channel.

This happens only when something is playing. If I pause/mute/stop the audio the noise goes. If nothing is playing there is no noise/disturbance at all.

I have changed different sources, interconnects and the issue most certainly seems to be with the amp. I have a different amp which has no such issues.

Turning the amp on-off sometimes fixes it but not always - the noise also comes and goes - its not always there when playing something.. its intermittent..

Any ideas or help in diagnosing?

 

[ejp]

Does it vary with the volume control? Do the tone controls affect it?

 

[rayma]

Is it noise or distortion? It's unlikely noise would be modulated by the signal.

 

[dakku]

The disturbance doesn't seem to be amplified by the volume - or I haven't been able to fully test..

But when it's starts, if I pause the music it goes away.. unpause and it's back..