[LAD] [Somewhat OT] Strange failure mode of a PC

fons at kokkinizita.net fons at kokkinizita.net
Sun Jul 18 09:14:49 UTC 2010


On Sat, Jul 17, 2010 at 10:56:47PM -0400, Gene Heskett wrote:

> Some lubricant obviously made its way in there, and one would have to 
> assume that the switched current was sufficient to cause a microscopic 
> arcing, which will in time create a smoke film on the internals, which is 
> what you were measuring, and which caused the PSU to think the button was 
> pressed full time.  Lubricants are a good idea only on a circuit that can 
> be called a dry circuit, where dry=microamp currents at very low voltages.

Ah, yes, these plastic things are often lubricated.

> Washing it out with acetone was ok, but I would probably have reached for a 
> can of paint thinning alcohol as it is less likely to degrade the plastics.

I know, but the acetone was all I had available...

Ciao,

-- 
Je veux que la mort me trouve plantant mes choux, mais
nonchalant d’elle, et encore plus de mon jardin imparfait.
(Michel de Montaigne)



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