Having problems with your PC Desktops ?

The fan on my HP desktop is always on. When I fist purchased it it only came on for short periods evevery few minutes, usually when doing some intense processing. Is there any common cause for this?


Answers :

Accumulated dust and dirt particles inside a computer are the usual culprits for above normal fan activity. Open your computer and have a look inside to see if it needs cleaning.

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    \015\012
  1. Turn off and unplug the computer.
  2. \015\012
  3. Remove the casing of the computer (directions should be in your computer manual). It is recommended that you bring the computer outside at this point because in the next step there'll might be a lot of dust coming out of your computer.
  4. \015\012
  5. Use the can of air to clean out the dust from the vents and the fan in the back of the computer.
  6. \015\012
  7. Use a can of air to blow the dust out of the computer going in one direction while using short bursts of air (you want to clean all the circuit boards, underneath the motherboard, the bottom of the case, get rid of dust on any of your drives and blow air into the power supply box). You want to try to get as much dust out of the computer as you can, if there is dust on the inside of the case you should try to get that out of there as well. Try to avoid any direct physical contact with any circuits in the computer.
  8. \015\012
  9. Put the case back on
(source: http://www.computercleaningguide.com/)

If you have any more questions, just come back here and leave a comment - I'm happy to help.
\015\012Your fan speeds up and slows down in response to temperature inside the computer. More so the CPU.

I would suggest getting a can of compressed air made for computers

take it outside, take of the side and blow all the gunk out of there, Really go to town around the fan (you might want to wear eye protection)
While you are in there just check that the CPU cooler itself is not loose

If it is it will have to be re-seated.

If it needs re-seating don't just take it off and put it back on as that might make things worse with your temperature problem the have to be cleaned and new thermal grease put on

I think this may be your problem before you buy a new CPU make sure you check the cooler assembly and make sure you use new thermal grease ($2-5)

DON'T remove the CPU just the fan/cooler assembly.

You must clean both the surfaces without scraping anything off. Use isopropynol alcohol and cotton bud sticks until both surfaces are clean, you can use your finger nail to scrape harder residue if you wish but nothing else.

DON'T pour the alcohol over the CPU

Now apply some new thermal grease (most computer shops have it)
Be careful about how much you put on
Here are
some basic instructions

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