Mac SE/30 making zipping and buzzing noises

azd30 azd30 at
Fri Mar 20 11:00:01 CDT 2015

Yes. It needs a re-cap job. SE/30's are notorious for that apparently. We just had that discussion on the Seattle RetroComp list.

check these out:

Hope this helps. 


----- Original Message -----
> From: dave at
> To: "cctalk" <cctalk at>
> Sent: Thursday, March 19, 2015 10:39:29 PM
> Subject: Mac SE/30 making zipping and buzzing noises
> I'm gradually restoring a Mac SE/30.  Today I got a new PRAM battery and
> installed it.  There was no battery leakage, so I'm good there.  The
> machine seems to run just fine.  The big problem now is that even though
> nothing should be emitted from the speaker, I'm getting zips, buzzes, and
> burbles from it depending on what the computer is doing at the time.  I'm
> quite sure the the sound circuitry is somehow picking up RF noise from the
> system bus.  What does this symptom indicate?  Should I recap the whole
> machine?

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