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From: AdenOne on 31 Jan 2008 19:04

System is Pentium D 925 3GHz D0 revision, ECS Alhena5 mainboard with
latest BIOS update. (Compaq-Presario SR5020AN but swapped the Celeron
3.33GHz for a P-D about 5 months ago) it has worked fine ever since.

This got me by surprise - my one computer was in sleep mode, as it
often is, and when i moved the mouse to wake it, nothing happened, it
turned on but never resumed windows.

So I reset it and suddenly the CPU fan failure warning came up,
initially the fan spun up but then just stopped a few seconds into
POST. According to BIOS, CPU was -128 degrees C. Obviously an error.

So I held a molex powered fan over the CPU fan to at least get some
air flowing, restarted, and overrode the CPU fan failure message and
started Windows Vista. Once at the desktop, SpeedFan started as usual,
I have been using it for about 3 weeks to adjust fan speeds and so on
to cool the PC a bit more efficiently. It has always worked fine.
According to speedfan, the CPU was at -128. I manually set CPU fan
speed to 100%, and it spun up! So now I can at least use windows
without holding a molex fan.

Now, the second strange thing - it seems part of speedstep has also
failed as CPU switches from 3 to 2.4GHz but stays at a voltage of
1.324v where usually at idle it is 1.20v

Thirdly, according to speedfan the +3.3v is actually 4.08v, +5v is
6.85v, +12v is a massive 16.32v while -12v is 4.01v ?

Fourth, CPUID's HWMonitor can no longer read CPU temp, Case temp, or
ANY of the voltages!

As long as I keep speedfan set on "Software Controlled" then I can
manually set the fan speed - the second I put it onto
"SmartGuardian" (the original setting) the fans stop - due most likely
to a CPU temp of -128 C !!!

Whats going on? Could it be that the Pentium D's temperature and\or
voltage sensor is broken? Or is it the mainboard's hardware sensor, an
ITE8718F.

Help would be much appreciated, as I have no idea whats going on now.
Never had this sort of error before. And it has been working fine for
months without even one crash or hang.
From: Paul on 31 Jan 2008 20:08
AdenOne wrote:
> System is Pentium D 925 3GHz D0 revision, ECS Alhena5 mainboard with
> latest BIOS update. (Compaq-Presario SR5020AN but swapped the Celeron
> 3.33GHz for a P-D about 5 months ago) it has worked fine ever since.
>
> This got me by surprise - my one computer was in sleep mode, as it
> often is, and when i moved the mouse to wake it, nothing happened, it
> turned on but never resumed windows.
>
> So I reset it and suddenly the CPU fan failure warning came up,
> initially the fan spun up but then just stopped a few seconds into
> POST. According to BIOS, CPU was -128 degrees C. Obviously an error.
>
> So I held a molex powered fan over the CPU fan to at least get some
> air flowing, restarted, and overrode the CPU fan failure message and
> started Windows Vista. Once at the desktop, SpeedFan started as usual,
> I have been using it for about 3 weeks to adjust fan speeds and so on
> to cool the PC a bit more efficiently. It has always worked fine.
> According to speedfan, the CPU was at -128. I manually set CPU fan
> speed to 100%, and it spun up! So now I can at least use windows
> without holding a molex fan.
>
> Now, the second strange thing - it seems part of speedstep has also
> failed as CPU switches from 3 to 2.4GHz but stays at a voltage of
> 1.324v where usually at idle it is 1.20v
>
> Thirdly, according to speedfan the +3.3v is actually 4.08v, +5v is
> 6.85v, +12v is a massive 16.32v while -12v is 4.01v ?
>
> Fourth, CPUID's HWMonitor can no longer read CPU temp, Case temp, or
> ANY of the voltages!
>
> As long as I keep speedfan set on "Software Controlled" then I can
> manually set the fan speed - the second I put it onto
> "SmartGuardian" (the original setting) the fans stop - due most likely
> to a CPU temp of -128 C !!!
>
> Whats going on? Could it be that the Pentium D's temperature and\or
> voltage sensor is broken? Or is it the mainboard's hardware sensor, an
> ITE8718F.
>
> Help would be much appreciated, as I have no idea whats going on now.
> Never had this sort of error before. And it has been working fine for
> months without even one crash or hang.

Occasionally, parts do not get soldered properly to the motherboard.
Sometimes the legs on a chip are "dry", or there is an intermittent
connection. Using a strong light and some magnification, inspect
the ITE8718F in the corner.

(upper right hand corner of the picture here)
http://h10025.www1.hp.com/ewfrf/wc/genericDocument?docname=c00864922&cc=us&dlc=en&lc=en&jumpid=reg_R1002_USEN

Paul
From: ~misfit~ on 1 Feb 2008 00:50
Somewhere on teh intarweb "AdenOne" typed:
> System is Pentium D 925 3GHz D0 revision, ECS Alhena5

ECS??? Why in the owrld would you have ECS?

> Never had this sort of error before. And it has been working fine for
> months without even one crash or hang.

Then you've been lucky. It seems it just ran out.
--
Shaun.


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