Re: odd problem with racing fan

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"Twayne" <nobody@xxxxxxxxxxxxxxxxxxx> wrote in
news:eyy9Ep37IHA.1420@xxxxxxxxxxxxxxxxxxxx:

A while ago I began to have an odd problem.
....

I had not thought about a temperature issue. However, I find this
confusing: if that is the case, why does this not happen when I am
using the computer? I do CPU and disk intensive stuff. This has never
happened while I am at the keyboard. However, a temperature issue as a
side effect is possible, I suppose. If a process does not stop but
some involved fan does stop as the computer goes into standby, there
could be heat buildup at the affected location. I think this calls for
a somewhat odd sitution but I already know the problem is odd.

Hmm, check the fan blades themselves for gunk buildup too. Might's well
go over it good while you're at it. Do NOT remove the cpu fan!! Just
make sure it's running and pushing air. Else you could damage the heat
transfer to the heat sink; they're real picky.

I agree it's odd, but I've had a similar experience and it was an
ongoing one. Only in my case it was a failure to Restart if I turned
the machine off and then within a few minutes, say up to ten, decided to
turn it on again. There was a fan that, if the temps were high, was
supposed to keep working after ShutDown. But a broken control wire
stopped it from doing that. So, I'd turn the machine off, ALL fans
would stop, and residual heat from the components would cause the temp
inside the case to start climbing. Natch, the sensors, being basically
probes, sensed the temp so as soon as I started the machine again, the
sensors would say "too hot!" and it would refuse to boot. Give it
another twenty minutes, and everything was fine again. Yup, it was
during last summer, really hot, and the ac for this room was out(a
window unit).
I tore my hair out for quite awhile figuring that one out. The
broken wire, actually a case of crimped insulation, not really broken,
was found by accident and since then everything has been fine. But the
temp rise only happened when the computer was powered OFF so it took
awhile to realize what was going on.
Since then I've added an additional, more powerful fan to the case
and the internal temps dropped by almost 20 degrees C in that heat.
Once I got the ac running again it was even better but I left the
additional fan in there for good measure<g>. After all, there was a
mountint place for it, so ... why not make use of it?


If I deliberately set the computer into standby mode, the led on the
DVD burner flashes continuously but the fan does not race, based on a
very sample number of experiments. I will try that a few more times to
see what happens.

That's really curious: Try unplugging the DVD drive and see if you can
get the symptoms to happen with it unplugged. I've never noticed DVD
lites flashing continuously during standby; maybe as the machine goes
into/out of standby, but not during. It should be ignored while it's in
standby. Assuming especailly there is no DVD in the drive, it shouldn't
be operating.
The temp sensors might show you something there if it has one.

Best of luck,




If the above doesn't help at all, try turning the machine off at
night and see if there is an ontime to when the problem may appear.

If I turn the computer off entirely the problem does not manifest
itself, as far as I can tell.

That's about all that comes to mind right now.

HTH

It certainly gives me something to consider and try. I will report
what happens.

Thanks for giving it some thought.

- Shankar



.

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