Mac SE/30 making zipping and buzzing noises

[azd30]

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:

http://applefool.com/se30/images/img/2d9cbc05.png

https://wiki.68kmla.org/Capacitor_Replacement#Macintosh_SE.2F30_.28630-4198-11.29

Hope this helps. 

cheers
--
alex

----- Original Message -----
> From: dave at 661.org
> To: "cctalk" <cctalk at classiccmp.org>
> 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?