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I have a 3 yar old laptop that runs loud......i have sprayed compressed air in it, and still noise. it shuts down at times. i won't try to remove the fan. i have a heat cloth under it, but its still loud. suggestions? and what would a new fan cost to buy and have installed?

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Perhaps you should reconsider removing the fan. You may find your particular Model/Brand of laptop's fan, not that hard to access.

The pathway that leads air to the Cooling Fan, may be of a design where it has a filter. A piece of foam-like material, essentially. The pathway I'm describing is the Cooling Duct.

Using a can of compressed air for computers was/is an excellent idea.
However if I may,

1) It needs to be sprayed only in the Intake Cooling Duct, not the Exhaust Duct.
Where air is drawn in is the Intake Cooling Duct.

2) The filter I lightly described is at the end of the Intake Cooling Duct.
Dust, dirt, hair, (Animal and people), carpet deodorizer, you name it, can build up over time, and compressed air alone cannot remove it.

The area needs to be accessed, and the foreign debris physically removed.
Q-tips, a small brush, and compressed air are used.

To show some examples:

1) Moderately easy:
http://www.irisvista.com/tech/laptops/Toshiba1805/sat1805_CPU.htm
(You can click on the photos to enlarge)

The Cooling Fan assembly is near the top.

Moderately difficult:
2) http://www.insidemylaptop.com/take-apart-asus-eee-pc-1201n-netbook/

The laptop is disassembled down to the middle section, to access the Cooling Fan.

More difficult:
3) http://www.insidemylaptop.com/take-apart-hp-pavilion-dv5-laptop/

The laptop has to be completely disassembled, (Motherboard removed), in order to access the fan.

If you wish I could do my level best to guide you step by step, and if available be able to post diagrams, photos, and a Service Manual.
(Free)

Just post in a Comment.
(Want to know more about my expertise? Left-click on my avatar)

Posted on Oct 01, 2010

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The three most likely causes are:
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2. One or both of your RAM memory sticks is faulty. Check the laptop user guide or maintenance guide and read how to access those memory modules. Basically, you remove some cover screws on the bottom panel of the laptop (after removing the battery and power cord!) remove one stick of RAM. Replace the cover and run the laptop a while to test that module. If it works OK, shut down, remove cover and move that module to the empty slot beside it. Test again. If OK, repeat the test but this time use the other RAM module. This procedure will isolate which, if any, RAM module is faulty .... or which memory slot in the laptop is faulty.

3. Either your power cord/charger unit is faulty or the power input jack on the laptop is damaged and making a poor connection. Wiggle the cord a little when the laptop is running to see if that causes the laptop to shut down.

Other possibilities include a bd or failing hard drive or malware/virus infection. Take it to a computer repair place.

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