Audio Problem with AC

[fabiusmax]

I hear a very bad sound quality, like scratchs on ancients disks from a stereo connected with phone output when I use my Sony Vaio FE28B with Ac Adaptor. The very strange fact is that if I use battery I've no problem. I think this is not normal. I've this problem since the first day I've purchased the notebook

[kee-lo_]

I would send it in for repairs as it sounds like one of the cables for the AC is too close to the soundcard