Help with Dac AH - loud hissing sound

[johnnyccs]

Hi everyone,

Been a happy owner of the Dac AH for 2 years until recently it started to give out loud hissing noise whenever I turned it on.

Anyone who shares the same experience? How do I repair this?

Appreciately.

 

[Puffin]

More information required :-

Are getting a music signal through both channels or just hiss?

Has it been modified in any way?