On Jun 26, 2010, at 5:47 PM, Jim Scott wrote:
On Jun 26, 2010, at 5:36 PM, JOHN CARMONNE wrote:
On Jun 26, 2010, at 5:23 PM, Jim Scott wrote:
I don't have another machine to test the display in so I'll have
to put in the new display and I guess kinda hope it's OK, can
the display work awhile and then crap out due to a capacitor
problem? Also can the Apple ASD pickup this defect?
Both ASD (in OS mode) and Apple Hardware Test (should be on the
install DVD) are pretty good about catching problems with the
video circuitry. However, I just processed an iMac G5 17" ALS
which passed both ASD and AHT tests (4 in all) without an error,
yet sports one popped/leaking capacitor on the logic board and
throws occasional artifacts on the LCD. It also refuses to boot
to the desktop and freezes right at the transition from the grey
screen to the blue screen. Yet it will boot to the desktop in
Safe Mode, which has lower demands on the video circuitry. It's
sitting on a shelf awaiting a new batch of capacitors. FWIW, this
iMac also chimes on startup, which means it passes POST. So it's
worth replacing the 29 caps on the logic board to save it (I hope).
Jim
I haven't seen any of these caps, are they big enough for a 65
year old to see? I can solder OK if I can see the joint site
clearly, Really 29 of them? I have a TiBook board that I know the
burned caps but I can't see that small to fix it plus it's a 400
MHz so who cares? The machine in question is running a 23" HP
monitor I put for the kids about 8 mos ago and it works great so
is that an indication the boards are OK?
Yep, the capacitors are big enough for even a 70-year-old to
see. :^) Yep, there are as many as 29 caps on an iMac G5 logic
board up through the ALS model. Go here to learn more: <http://
jimwarholic.com/2008/07/how-to-repair-apple-imac-g5.php>.
Jim
This is great addition to my repair manual folder. It looks like a
good weekend project. I got one of the lighted magnifier head sets
from Harbor freight but it's not what I expected so I need to find a
better one then I'll feel like tackling this. Thanks Jim.
JOHN CARMONNE
Yorba Linda USA
From TiBook 800
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