The uP's have sensors under them or inside as the case of some.
The fans are modulated to the airflow needed. If the room is cool it might
take a while - and if the cpu is in sleep mode - maybe not at all.

Drove us crazy in the lab - like an engine fan today - never know when a fan
starts up.

I'd contact Compaq - and inquire. You likely have a power saving mode on and
that might be part of it.

RMB (right mouse button) in the open desk top and go to settings - .. see the world -
select that settings...

Martin

Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder



wrote:
I have a Compaq Presario 6010 us about 2-1/2 yrs old. It has XP home
-sp2, 736 mb ram, 40 GB hd, 1.4 ghz cpu.
Several days ago It suddenly went dead, no blue screen- power was off .
It rebooted right away but crashed again in a few minutes. I smelled
something like hot phenolic material. After a little checking I found
that the power supply fan was not working. I gave it a little nudge and
it spun up. Now it quits occasionally, even if it's on in sleep mode
overnight and I have to reboot. Ordinarily I'd just get a new fan and
install it but years ago I had the same problem with a different
computer. After I'd put in 3 new fans I found that the problem was low
voltage from the power supply. Before I go and buy a Compaq power
supply or fan I'd like to determine exactly what the problem is. When
I'm using the computer I"ve noticed that the fan sometimes turns of
then on later. I moderated the fan voltage with my multimeter and found
that the voltage would drop to about 4.5v and the fan would stop. Later
the voltage would rise at about 1 v per minute until it got to 10.5 v
and the fan would restart.The fan seemed to bind a little so I squirted
in a little penetrating oil. It freed up but it still sometimes crashes
overnight. Does the power supply have some sort of heat sensor that
regulates the fan speed according to temp or is the PS going bad? The
voltage it feeds to the other hardware is satisfactory. I've never paid
any attention to this until I started having troubles.
Any ideas?
Engineman


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