Re: AppleColor Composite Caps

On May 29, 9:28 am, Polymorph <polymorp...@xxxxxxxxxxx> wrote:
On May 28, 5:30 pm, "Michael J. Mahon" <mjma...@xxxxxxx> wrote:

I note that "rated life" and "actual life" can be quite different!
Much depends on the temperature and voltage history, and perhaps
even more depends on the manufacturing run.  ;-)

Yes, like that rather infamous batch of capacitors that Dell (and
others) used on their motherboards some years ago.

We had more than 100 Dell GX270 computers and over the 3 year warranty
period about 50% had their motherboards replaced due to bad caps. At
first they were just the ones near both ends of the DIMM sockets but
some of the later ones had failures in a row of electrolytic caps
hiding under a heat sink between the CPU socket and the rear panel.

We also had a small number of ATI graphics cards with bad caps.

Most recently I have found some graphics cards where the heat sink has
popped one or two of the spring loaded restraining pins leaving the
heat sink no longer in contact with the GPU - very strange video
effects when the chip overheats.
.

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