Damn, my advice was backward. The BAD ones have the "+" on top. The GOOD ones have the "K" on top.
On Jun 13, 2013, at 5:59 PM, H J <heywoodj...@yahoo.com> wrote: > --- On Sun, 6/2/13, Macs R We wrote: > > Just because the capacitors on the logic board "look fine" > > doesn't mean they are fine. Bulges prove they are bad, but > > no bulges don't prove anything. One thing that is known is > > that if your capacitors have "+" shaped slots on top, they are > > not the bad lot -- the bad lot all have "K" shaped slots on > > top. This can also be determined by the serial number > > ranges for the bad iMacs, which Apple has published. > > Interesting! The caps on this particular board are plus-shaped, > so by that logic they should not be an issue. On the other > hand, according to > > http://jimwarholic.com/2008/07/how-to-repair-apple-imac-g5.php > > the serial number of the machine in question _does_ fall within > the affected range. So I'm stumped. > > > On this model, if the machine boots as far as yours does, > > I'd sooner suspect the logic board capacitors than the power > > supply capacitors. In any event, the 12V lines are > > mainly used for running mechanicals (hard drive, optical > > drive) and not logic elements. > > --- On Sun, 6/2/13, LuKreme wrote: > > I wouldn't think that 0.2V out of 12V would be a problem at > > all, especially since the 12V lines have nothing to do with > > powering the motherboard (the motherboard and other circuit > > boards get the 5V or 3.3V). I suspect it is not the PSU. > > That's really useful information -- thank you both. I suppose I > might have guessed that the electronics all run off the two > lower voltages, but I was not sure. > > One other thing that was suggested to me is to re-apply the > thermal paste between the CPU and the heat sink. I'm away > from the affected machine for a long while now, but will look > into that when I get back. Meantime, does anyone have a > favorite temperature monitor utility that would run on such > an old machine (PPC G5, 10.4)? I'm thinking that would be > a useful thing to try before I pry off the heat sink. > > Thanks again, > > -HJ _______________________________________________ MacOSX-talk mailing list MacOSX-talk@omnigroup.com http://www.omnigroup.com/mailman/listinfo/macosx-talk
