請問why　my　ｃｏｍｐｕｔｅｒ　出ｄ怪聲??

If you confirm the sound came from back, it should be one of the following reasons:
(disconnect power supply before do the followings)

1. Dust in Case Cooling fan: open your case and you can clean them out. If your cooling fan is too old(say 1-2 years), you can add some lubricant(smoothing oil) to ensure it run smoothly without sound.

2. Dust in Power Supply fan : Use torch and point into the power supply, check if there is any dust or not. if yes, you can use vaccume cleaner to clean first and use tooth picker to pick the dust one by one(if they group together) carefully. Don't use too much force.

3. Cable over cooling fan : Open your case, connect power and turn your computer on, check if there is any cable is near cooling fan, fix and tight them properly.

4. Harddisk life(the sound should come from front) : Open your case, connect power and turn on PC, heard the sound source. If the sound is from Harddisk, it should be obvious.

No matter for what reason, you should clean your PC once for every 1-2 months, if you are a bit lazy, you can clean it once for every 4-6 months.
This depends on how dusty is your house.

朋友：
　　你可打開機箱側板，拔掉所有風扇電源（除處理器的）看
看，風扇很嘈很多時候是有３個原因：第一，它很污糟，因此
運行受到阻滯而產生的；第ニ，它碰到東西－電線等；最後的
便是它用了太久太久因而磨損產生嘈音，因此要換的機會是３
份之１，前两個的情形可輕易解決，老實說如果對電腦有些少
認識，清潔主機實在很易（自己當家常便飯），是新手的話，
可到公共圖書館找砌機書，那處大把；最後的就要換，亦是易
過借火－除下風扇／散熱器及其風扇，到電腦店買過一件就得
，非原裝散熱器及風扇更易於安裝，所有以上的，做起上來是
易過砌ＬＥＧＯ很．．多倍，正是：自古成功在嘗試，如果真
的要做，開箱前切記事前要拔了主機電源（清潔主機、清潔用
品和一些新電腦書見／　／ｋａｉ－ｙａｎ．ｕｗａｎｔｓ．
ｃｏｍ）；硬碟出的如此噪音就可能它將有事，做定備份都得
。

雲遊四海，浪跡江湖。
　　

你好?你部computer 開機時有d “crack’crack” ge 聲過左3second無左聲.
可能你的機內電線鬆散而hi到風扇,所以發出聲,你看computer是否電線鬆,我以前試得多你試下連好電線開返就無事,希望可以幫你!!!

fan is dirty

此乃硬碟就死先兆
有用檔案先做備份
再買硬碟換上