Walter:

Have you tried replacing the battery on the logic board?  It will surely
give out after a few months if you unplug your iMac [or switch off the
power strip] when the computer is not in use, or in a few years if you
leave the computer plugged into a live socket.  When the battery fails, all
sorts of strange things can occur, some of them similar to what you
reported, including the apparent "self-repair" after 20 minutes.

Before you give up on this iMac, buy yourself a 3.6-volt 1/2-AA size
Lithium battery and use it to replace the one already on your main logic
board.  In your model of iMac, the battery is readily accessible by
removing a small cover plate on the bottom of the computer, through the
same port by which one can add additional RAM.  (Instructions are given by
Apple somewhere on their website if not in the instruction sheet that came
with your computer.)

This battery is available in the U.S. from any Radio Shack retail store as
part no. 23-026 for about $12, so its cost just for a test is not
prohibitive.  These batteries are manufactured in Israel by Tadiran (type
TL-5101) or France by SAFT (type LS 14250).  I think Duracell in Germany
also makes a similar battery.  If Radio Shack has no stores in the U.K.,
there must be other electronics shops or computer stores (not to mention
any Apple Computer centre) that stock such batteries.  They can also be
purchased from web sites that specialize in computer parts, especially
those for Macs.

Melvyn Halbert

--original message--:

In-Reply-To: <[EMAIL PROTECTED]>
Message-Id: <[EMAIL PROTECTED]>
From: walter <[EMAIL PROTECTED]>
Subject: iMacDV dying off
Date: Fri, 9 Jan 2004 17:18:58 +0000

Hi listers,

my iMacDV special edition (slot-loading graphite) 500Mhz G3 died today.
Four weeks after AppleCare expired, needless to say.

Two weeks prior to my warranty running out, the computer wouldn't wake
up from sleep. The power button light went green, the screen went grey,
but the HD would not spin up. I did a forced restart, but the same
thing happened at startup. Power light goes green, grey screen, but the
HD would not spin up. I put the hardware test CD in, and the CD-Rom
drive wouldn't even take it.

So I switched it off and unplugged it for twenty minutes.

I plugged it back in, and tried starting it up again. No problems at
all. I was quite puzzled so I called up my local Apple centre
describing the problem and explaining that given that my warranty had
two weeks left, maybe it made sense to have it checked up. They said to
monitor the problem in the remaining two weeks and that if it came up
again I should take the computer in. If not, it was difficult for them
to assess an intermittent problem of the kind described.

Of course the iMac behaved impeccably for the following fortnight...

. . .  <snip> ...

Regards,
Walter

------------------------------



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