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After about 4-5 minutes of operation, the computer shuts off unexpectedly.Everything else appears to work OK, internet access, etc. It doesn't appear to be overheating, but can't be sure.

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  • Chandler Huffman Aug 03, 2010

    joecoolvette, I did as you suggested regarding the fans. They are clean and free of any dust or gunk, and they are operating properly. I also took the fan and heatsink off the CPU to clean it, but
    I need to get more paste. As of the last attempts, the computer now shuts off during the boot process or shortly thereafter. I'm still open to any further suggestions. I do appreciate your help and I apologize for not getting back to you sooner.



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Appreciate your getting back to me chanhuf.

If I understand correctly from your statement, did you state you turned the computer on with no thermal paste, on the top of the Processor's case? If so the Processor will overheat, and turn off. (BIOS turns it off)

If I have stated this already, forgive me.
The top of a Processor's case, and the bottom of a Heatsink are not perfectly smooth. A magnified view would show 'Pits, Hills, and Valleys'.

When the heatsink is set on top of the Processor, the voids mentioned above create air pockets.
Air is an Insulator, not a Conductor.

You want to Conduct heat from the Processor to the Heatsink.

[Typical construction of a Heatsink is a flat plate of metal, with tall, thin fins protruding from it.
The flat plate of metal, absorbs heat from whatever object it is placed against.
(In this case a Processor)

The tall, thin fins absorb heat from the plate, and the fins radiate the heat
When a fan is used in conjunction with a Heatsink, the air flow helps carry the heat away from the fins of the Heatsink ]

Thermal paste fills the voids. Thermal paste is an excellent conductor.

You did follow Anti-Static Precautions, correct? A Processor is the most
susceptible hardware computer component, to Static shock.

Awaiting your findings after applying thermal paste.
To add, there is a correct procedure for applying thermal paste.
(Thermal paste = Thermal grease)

Posted on Aug 04, 2010

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A computer that shuts off unexpectedly is most of the time caused by heat. Check if the fan in the power supply is working fine by checking the back of the computer. You can take out the CPU too, clean it properly before adding a new layer of thermal paste. In this way, the heating issue will be eliminated.


Posted on Aug 02, 2010


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