Replacing cpu

[jd1008]

On 06/28/2015 01:41 AM, Tim wrote:
> On Sat, 2015-06-27 at 13:21 -0600, jd1008 wrote:
>> I noticed that during the installation of fc20, the air coming
>> out of the exhaust vent was almost scalding if I kept my finger there
>> for about a minute or so. By scalding, I mean if I had touched
>> a metal surface of that temperature for say 30 seconds, I would
>> have felt some pain.
>>   
>> Also, I noticed that the cooling fan remained at normal operating
>> speed, instead of spinning faster, as I usually hear it spin fast for
>> about a few seconds when I power it on.
>>   
>> So, I am not sure whether the problem is the fan or the cpu.
> I can't say that I've ever felt air come out of a system that was too
> hot to keep my fingers in.  So I think there is something to be
> concerned about.
>
> Rarely has my laptop ever revved up to full blast, and even then it was
> just toasty on the fingers.  There was a nasty hot plastic smell,
> though, if it went full pelt (there were about five fan speeds; ranging
> from near silent, quiet whirr with barely warm air, mildly noisy with
> comfortably warm air, that might be expected during normal use, then one
> or two more hotter ones that I rarely ever experienced).
>
> Installs very rarely went full blast, you might get a few seconds of
> highly intensive computations, while dependencies were worked, but it
> would drop down again shortly.  Web browsing could cause problems much
> more often, with pages that had Flash video going bonkers, or bad
> scripting.  The fan would go full blast as the CPU heated up.  Again,
> never got to the point where it might cause me any skin damage from the
> hot air.
>
> Computers have a couple of ways of not overheating, that may be used in
> conjunction; such as slowing the CPU down so it generates less heat, or
> speeding up the fan to dissipate more.  This may be automatic, there may
> be preferences as to what you'd prefer (such as staying quieter as a
> preference, so it slows the CPU down first, then ramps up the fan speed,
> rather than speed up the fan, then slow down the CPU).  You could look
> in the BIOS for cool and quite options, to see if you can influence
> anything.
>
> If you are getting hot air blasting out, I'd be inclined to believe that
> the heatsink is attached and working.  If it weren't attached well, I'd
> expect inadequate heat dispersion from the airflow, and the CPU to
> overheat and shutdown (or burn out).
>
> If the fan seems to run without a struggle, I'd expect that the fan is
> okay.  Its the computer that changes the fan speed, so a lack of proper
> fan speed changes would suggest the controller rather than the fan.
> Perhaps the thermal sensor isn't working well?  Do you have another OS
> you can easily try on it (e.g. a live disk).
Hi Tim,
Last night, I did indeed try the fc20 full install DVD in rescue mode.
I simply went into the shell and ran

while true; do
ls -laR /
done

When I got up in this morning, it had panic'ed in the same way
as the image I uploaded at sendspace.com.

>
> On my laptop, if I leave it in the BIOS (interrupting the boot-up), the
> fans will eventually go fast, though blowing cool air (the CPU is not
> heating up).  I think it's a failsafe to ramp up the cooling in case of
> a fault.
>
>