You know, I took apart an iMac G3 last year, ended up throwing away the whole guts...had good speakers on it :-/ Dunno if I recall asking anybody if they wanted anything, I might have shipped the analog board to mcdermnd. Can't remember.

Have you lot seen this ...third result on Google?

Does the deterioration have anything to do with either just plain age, or is it linked to heavy abuse, or just casual wear & tear? I will say that the CRT on the iMac G3 series is rather mediocre, the machines are just as heavy as a Compact, are unusually ungainly, but do have pretty nice speakers for an AIO.