In the meantime, have you re-soldered the power connections to the analog
board? There's a group of them, large-ish pins (might be a connector body,
don't totally recall), which tend to develop near-invisible cracks in the
joints where they meet the board.
AFAIK the issue is common to all of the classic compact Macs, and it can
cause all sorts of odd problems.
On Fri, Mar 20, 2015 at 1:27 AM, Terry Stewart <terry at webweavers.co.nz>
wrote:
Yes it sounds like caps Dave. A very common issue
with those machines.
Terry (Tez )
On 20/03/2015 6:39 PM, <dave at 661.org> wrote:
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?
--
David Griffith
dave at
661.org
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