Re: [foxboro] Bulging Capacitors in P92 (P0923LT)
- From: Michael Toecker <michael.toecker@xxxxxxxxx>
- To: foxboro@xxxxxxxxxxxxx
- Date: Tue, 31 Mar 2015 11:31:39 -0400
We found the issues with the model of capacitor online as well, and it
looks like the caps we had replaced are generally considered "poor". The
problem is, wikis and forums aren't product notifications and IOMs. :)
The environmental conditions of these servers are generally good.
Installed in climate controlled areas, with AC, humidity monitored, plus
high temp alarms. I hear that the water content of some of these caps is
high, and loss of water due to high heat or low humidity will eventually
kill an electrolytic, but we've got decent environmental to help mitigate.
Mike
On Tue, Mar 31, 2015 at 10:23 AM, Terry Doucet <doucet427@xxxxxxxxxxx>
wrote:
> This is more than just a Dell P390 problem. Have a look at Wiki
> Capacitor plague.
>
> Just in my own home I have had bulging capacitors in about five devices.
> Monitor, router, wireless device, TV and Dell desktop computer. Luckily,
> YouTube has videos instructing on how to take devices apart (without
> breaking them) and replace the capacitors.
>
> Wiki says that the problem was in manufacturing between 1999 and 2007.
> Two of my failed capacitors at home occurred in 2014. The process
> industries want their controls to last about 25 years. It is going to take
> a while for these bad capacitor products to be removed from active use.
>
> The capacitor manufacturers knew about the problem in 2003. Not sure when
> major product suppliers like Dell knew about the issue and started to check
> capacitors so that they did not use any pre-2003 made capacitors in their
> products.
>
> And then you have the generic problem, proportional to operating
> temperature where electrolytic capacitors will fail with time.
>
> Terry
>
>
>
> > Date: Tue, 31 Mar 2015 09:58:56 -0400
> > Subject: [foxboro] Bulging Capacitors in P92 (P0923LT)
> > From: michael.toecker@xxxxxxxxx
> > To: foxboro@xxxxxxxxxxxxx
> >
> > All Powerful List,
> > I have an interesting case for you.... We have several P92 workstations,
> > foxboro part P0923LT, that have been experiencing failures. After
> analysis,
> > an outside party identified that the failure was due to failed (bulging)
> > electrolytic capacitors on the Dell P390, and replaced them. We're in a
> > difficult place in our lifecycle replacement, and are coming up with a
> > bridging strategy between our current setup and a future setup, this is a
> > big problem in that strategy.
> >
> > Has anyone else on the list experienced this failure? If so, was there
> > more detail on what failed, why it failed, and how to prevent similar
> > failures?
> >
> > My concern is that replacing the capacitors may be a stopgap, and that
> > there may be other factors involved in the failures. For instance, if
> the
> > power supply isn't providing power to the motherboard at spec, it may
> > affect capacitor reliability. Humidity and temperature may also
> > contribute, as may storage of these systems when not in use. Also, these
> > capacitor failures may have other unintended effects elsewhere in the
> > system.
> >
> > So, basically I'm asking for your experience and some ideas on what might
> > be going on. Thanks!
> >
> > --
> >
> > Michael Toecker
> >
> >
> >
> >
> > _________________________________________________________________________
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> >
>
>
>
> _________________________________________________________________________
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>
--
Michael Toecker
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