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9 Answers -
Aibek
March 2, 2010based on my personal experience it can be either caused by too much of dust or one od the cables being hit by the fan.
(note: make sure to power off (and unplugg) your PC when you open the case and attempt to clean the dust)
Anonymous
March 2, 2010an insect may hv entered to ur fan..
after solve the prob. make sure to cover the opening sides of the fan as much as possible..
Zaid Pirwani
March 2, 2010The above two are correct, but let me also join the discussion, the PC fan may make noise because of many reasons:
But for all the reasons you will need to open up the case and then close it afterwards, oh and do not forget to turn off and unplug everything from the CPU before opening the CPU case.
1) Something(Wire, Bug) is coming in the way of the fan blades
Ans: Remove it…
2) One of the screws may have gone lose, if a screw is lose, the fan vibrates and makes NOISE..
Ans: try tightening them, if the fan moves if you touch it.
3) Maybe the fan has just worn out, broken, anything which has ended its life.
And: get a new one and replace it or get it replaced…
FYI… A noisy fan is a slow fan and a slow fan is of little or no use to keep a system cool…
oh yeas, loose screw is another possible reason for the noise
Aibek
March 2, 2010Taty
March 5, 2010If it is an enclosed power supply fan, be very careful if you intend on opening it. Make sure you are grounded and that everything is disconnected. They can give you quite an electric punch (learned from experience…)
Totally agree with Taty. If you need any help on how to easily ground
yourself see following link.
http://www.wikihow.com/Ground-Yourself-to-Avoid-Destroying-a-Computer-with-Electrostatic-Discharge
March 5, 2010Gomax
April 7, 2011how i open power supply i am not a computer engineeer any video for it if yes imform by my e mail gomax1990@gmail.com
Gomax,
you better don’t open it at all!
April 8, 2011Shaun146
June 26, 2011it may be a leaking capasitor
Szzlrfrank2003
August 13, 2011The fan blade on my pc popped out of its ball bearing. Which caused the blade to rattle and eventually stop. Open the pc and ground yourself by having skin contact on the frame of the case. Remove the power supply and the fan of the ps. Try to access the blade somehow and push the blade back into the bearing. Be carefull not to break the fan housing
Szzlrfrank2003
August 13, 2011Also regarding the above suggestion a little lubrication inside were the blade meets the ball bearing will not hurt. Or you can just replace it with a new one.
Ed007b
March 30, 2012Not only power off and unplug your computer when you are going to open the case. There can be charge left. When unplugged hit the on/off button. Your PC may start up for just one second, charge is released.
Never touch anything inside the PC that isn’t necessary, your body has charge too and a tiny current can damage electronics.