1) See if it is dirty inside.
The hardware components inside are cooled by air. The Processor (CPU) has a finned Heatsink sitting on it. The fins of the Heatsink absorb the heat from the Processor,(CPU); and radiate it away.
Air flow from the CPU (Processor) fan, helps carry heat away from the fins of the Heatsink.
When a Processor becomes too hot, (Exceeds it's thermal limit), it turns off. (BIOS turns it off)
This is a fail safe feature that is built-in. Keeps the Processor from burning up.
When the computer case fans get clogged with 'Gunk', and the Processor fan does the same; plus in-between the fins of the Heatsink; the cooling capacity of the cooling system, drops tremendously.
Also;
This is a general view of a top of a Processor,
http://www.cpu-world.com/CPUs/Pentium_4/index.htmlThis is a general view of a Heatsink/Fan combo, to illustrate the bottom area of an average Heatsink,
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=7151732&CatId=493Under the Main view are smaller views. Hover your mouse cursor on the small view all the way to the Right.
(Has a Thermal Pad already installed on it. A Thermal Pad is JUNK! More on this later. Look at the surface around that square Thermal Pad in the middle )
The top of a Processor, and the bottom of the Heatsink; are not perfectly smooth.
A magnified view would detail, 'Ridges, Valleys, and Pitholes'.
When the two parts are mated together, Air Pockets are formed. Air in this case is an Insulator; not a Conductor.
Thermal Paste fills the above imperfections, and is an Excellent conductor of heat.
After time (Age), and constant overheating, the Thermal Paste dries up. Looses it's thermal conductivity properties.
Replace the Thermal Paste.
A Thermal Pad is a material that is impregnated with Thermal Paste. As stated, they are Junk! Carefully peel off, removing as much as you can.
Then I use an old credit card, and scrape off as much of the Thermal Pad residue; as I can.
Follow with Q-tips dipped in Isopropyl Alcohol. (Rubbing alcohol)
91 percent or higher is best, but 70 percent will do. 50 percent = No IMHO; because it is now 50 percent Water, and 50 percent Alcohol. You want it to dry up quickly, and have strength to cut the old Thermal Paste, or Thermal Pad residue.
Yes. It usually turns into a gooey mess! Takes a LOT of alcohol soaked Q-tips. How clean? Clean enough to eat off of.
CAUTION!
Isopropyl alcohol is EXTREMELY FLAMMABLE!!
Use in a well ventilated area, with NO sparks or flames present.
Thermal Paste is treated the same way. Scrape off as much as you can, use Q-tips dipped in Isopropyl alcohol.
Now PROPERLY apply fresh, new Thermal Paste.
Example of Thermal Paste,
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3071621&CatId=503For additional questions please post in a Comment.
Regards,
joecoolvette
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