Loud noise in the case after playing CS?

Doesn't it feel shameful--Nanyang Da Lu ? Copying someone else's answer without changing it a little bit and then dare to take it out, can be described as bold! In addition to the last two lines of your own, the first nearly 450 words of the answer was copied word for word to steal for their own, really is the master of high-tech (computer) thief! Despicable! Shameful! Because of complaints about plagiarism in Nanyang Dalu, so all his answer column was deleted, and now I have been plagiarized in the content of the following, for the questioner's reference only. Need to state that I do not for the score, just plagiarism behavior is angry. I hope the questioner does not have to choose this answer. Attach the answer that has been plagiarized: The sound in the chassis depends on what characteristics it has. If it is intermittent "kakak" sound (sound lighter), it may be the sound of the hard disk reading, they can not do anything to deal with it, in addition to making a good backup of important files, you can ignore him. If it is continuous like the motor "roar" sound, it should be the sound of the fan, most likely when the power on the sound for a while on the good. The solution, of course, is (1) brush the dust, a little oil; (2) a new one. If you are not afraid of trouble, the former is both economical and practical way. Brush ash available small brush or large paintbrush, brush while blowing (blowing ash is best to have a "leather tiger", can also be used to hit the hair dryer in the cold wind gear, or even use a pump to install a basketball "air needle"); on the oil to uncover the fan in the middle of the circular film covering the center of the axle to expose, drip a little high-grade lubricant. to, drop a little high-grade lubricant (do not use cooking oil, because a little longer cooking oil will be sticky, affecting the fan operation), and then cover the film can be. Sometimes not several fans are ringing, how to determine which fan is ringing? You can take a chopstick, open the case to turn on the power, put one end of the chopstick on the board with a fan, the other end of the stick to the face, feel the obvious vibration, and vibration with the "roar" disappeared is. After brushing gray and oil can not solve the problem, then have to replace the new one. CD-ROM drive will sometimes make a sound, however, does not work is no sound.