Lot of static noise on audio channel

[mousehouse]

My rusty old Amiga makes a lot of static noise on the "red" audiochannel. Sometimes it's completely silent, other times it is making a very loud crackling sound on top of the audio that is being played.

My guess is that one or more of the capacitors need replacing, is that a correct guess? If so, I haven't soldered anything in 15 years. Any volunteers or recommendations in NL?

[mousehouse]

Thanks for the excellent resources!

Just swapped my Picasso II for a Picasso IV (a very nice card indeed), now the sound is perfect without static. But just to be safe I'm on the lookout for a good electronics guy, I also want the battery out and replaced by the nifty Li-Ion batteries I've seen in some pictures.