Amiga 600 sound distorted?

[TjLaZer]

Has anyone heard about the A600 having bad sound?  Distorted a bit when turned up real loud?  Not too bad but noticible on higher levels.  Could there be something wrong going on?  I also have another A600 that works but sound is dead...

[TjLaZer]

The louder I turn the sound up the more distorsion I get.  Well what do you expect, I got this from the infamous DoomMaster himself.  I was smart though and I drove down to pick this up myself.  He even charged me a $5 eBay handling fee if you believe that.

[TjLaZer]

No CIAs are surface mounted!  I also have two more 600's.  One is DEAD and the other works fine but has no SOUND.

[TjLaZer]

@patrik

I will have a look.  What am I looking for?

[TjLaZer]

@patrik

I check the MB over and it is all nice and clean!!  Do those caps cause the sound to not work?  Could it be the CIA or Paula?

[TjLaZer]

@stedy

How do I check all those?  I am not a expert in electronics.  Do I check for resistance?  With power off right?

Thanks