DELL D620 Laptop Running HOTTT! CPU at 100% .

August 15, 2011 at 11:23:28
Specs: Windows XP
I have 2 Dell D620 Latitude laptops. One was running very slow and was getting very hot so I figured there was a problem with the cooling fan. After building my own desktop successfully, so I figured I would crack open the laptop and see what was going on.

I found a clump of dust between the fan and heatsink. After cleaning out, as a precaution, I replaced the cooling fan, and added a new dab of Artic Silver thermo compound between heatsink & CPU, since the existing was dried up.

After putting everything back together, I still have the same problem.........I am running SpeedFan for diagnostics.

After turning on, temp runs up to 175deg f within 4-5 min and then fan kicks on high speed and cools it back down to 82f, the CPU is running at 99-100% and the system is almost locked up.

Any input on what else would not be functioning properly??
Damage done to heat sink because it got too hot previously??

I have 2 identical machines, so I can swap parts to experiment......maybe I will try swapping the heat sink, but looking for feedback before I tear it down again!

Any other diagnostic programs I can run to isolate the problem???

Thanks in advance for any replies!!


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August 15, 2011 at 12:29:41
"the existing was dried up"

What you had was a thermal pad. It has a totally different consistency than thermal paste.

"the CPU is running at 99-100%"

That has nothing to do with the paste. More than likely you have a program that's hogging the CPU. It may be a virus or malware. Did you check Task Manager?

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August 30, 2011 at 07:39:45
Thanks for your reply!

I checked task manager and found svchost.exe hogging 99% cpu. I ran some spyware & malware software and it cleaned everything up!

Running Smooth again!!

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August 30, 2011 at 08:22:47
"After turning on, temp runs up to 175deg f within 4-5 min and then fan kicks on...... "

175 F is near the max temp the cpu can be operated at without the cpu "misbehaving" and it should NOT heat up to that temp or that fast !
It sounds like you DID NOT install the heat sink on the CPU such that it's sitting flat on the CPU !

If a thermal pad was used between the heat sink and the cpu, a thermal pad has ~ straight edges - thermal compound or thermal grease does not.

svchost.exe is a built in Microsoft "slave" program that is used by other programs that do NOT show up in the Task Manager list.
You often have more than one instance of svchost.exe running at the same time.
You can find out which programs are using a particular instance of svchost.exe by using certain programs.
E.g. download Process Explorer from the Microsoft web site, install it, use it.

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