Re: Power Supply Cause of Crashes?
From: Floyd L. Davidson (floyd_at_barrow.com)
Date: 03/19/05
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Date: Fri, 18 Mar 2005 22:19:32 -0900
"W. Watson" <wolf_tracks@invalid.inv> wrote:
>Does it seem reasonable that a faulty power supply might cause
>my RHL 9 box to crash on occasion, once or twice a month? It
>crashed once again, and now crashes every time I get to the
>login after a reboot. I have to completely power down the
>computer to reboot. That is, I have to make sure the red LED on
>the motherboard is out, before attempting a reboot. Otherwise, I
>can't even get it to reboot.
I recently had obvious heat problems with a workstation
rebooting now and then. I monitor and graph, using both
lm_sensors and a Crystalfontz CFA633, all sorts of temperatures,
and one that correlated was room temperature! I have a forced
air furnace, and every time the box reset, it was right at the
end of a heat cycle, when ambient room temperature peaked.
The only parts in that box which are not monitored and graphed
are the components inside the power supply. The fans were
operating fine, the amount of heat coming out was about right,
and the voltages graphs showed no anomalies. And when I opened
up that power supply it wasn't particularly full of dust either.
So I looked at each heat sink, and found one that had a fine
layer of cat hair crossways on the fins, blocking air flow from
the fans.
I've blown 10 times that much dust out of a working power
supply, but this time the dust was in just the right place.
-- Floyd L. Davidson <http://web.newsguy.com/floyd_davidson> Ukpeagvik (Barrow, Alaska) floyd@barrow.com
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