I'll second that! (or am I the third? :-)
Dust can do evil things on a circuit board. I've personally rescued two
Mac SE/30's that exhibited all of the symptoms of SimasiMac disease by
simply and carefully cleaning the logic board with alcohol and a Q-Tip. In
both cases, the problem was compounded by the fact that some of the tiny
capacitors had physically leaked a small amount of sticky residue. Of course,
the dust stuck readily to that, and most likely set up a capacitance effect
or at least a resistance with the underlying traces or nearby components.
In any event, after the cleaning, both boards sprang back to life! Now, I'm
sure that over time, the leaky capacitors will cease to operate within any
kind of tolerance, so I don't consider this a permanent fix, but it's been
about three months now... (knock on wood).
Rob
>> > I think it might have been the dust...
>>
>> What makes you think that?
>>
>Next time Stuart comes up with an SE/30 covered in dust, give me a shout
>and I'll measure the electrical conductivity of the dust for you... It's
>very effective at shorting out the reset switches on PowerMac towers and
>Mac II family machines.
>
>Phil
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