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From: ostroff@oswego.UUCP (Boyd Ostroff )
Newsgroups: comp.sys.mac
Subject: Is my mac about to fry?
Message-ID: <403@oswego.UUCP>
Date: Mon, 15-Jun-87 23:26:17 EDT
Article-I.D.: oswego.403
Posted: Mon Jun 15 23:26:17 1987
Date-Received: Sun, 21-Jun-87 05:37:02 EDT
Reply-To: ostroff@natasha.UUCP (Boyd Ostroff )
Distribution: na
Organization: SUNY College at Oswego, NY
Lines: 30


I use a Mac 512Ke with Apple HD20 at home and with the recent warm weather
it has developed a high-frequency (15-20 khz) "whine" after it has been
on for awhile.  It only seems to happen on warm (over 75 degree) days
after the computer has heated up.

The computer is about 18 months old and for the last 6 months has been on
24 hrs a day as a BBS.  This is the first time I have had any hardware
problems at all.

I've read a lot about power supply failures and I'm wondering if this is
a prelude to a breakdown (I remember having a b/w tv years ago that did
this for awhile before the flyback transformer went up in smoke...).

So far this condition hasn't affected performance in any noticeable way,
but I find the noise so irritating that I have to shut the system down
in order to stay in the same room.  I'm also getting reluctant to leave it
on when I'm not at home for fear of finding charred remains when I return...

Anybody have a similar experience?  I don't have a fan - should I?  Would
this cure it or just postpone the inevitable?  I don't have Applecare,
so what kind of potential repair bill am I looking at?  Any responses
would be greatly appreciated!


-- 
UUCP:      seismo!rochester!rocksvax!oswego!ostroff
US MAIL:   Boyd Ostroff, Technical Director, Department of Theatre
           SUNY College at Oswego, Oswego, NY  13126
PHONE:     (315) 341-2138