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I don't know why but every morning when I turn on the computer, it makes a vibrating sound. Like its case is attached to a vibrator. But when I turn it off and turn on again using the power button (still at the boot loader) the sound is gone. Why is my computer creating the sound?

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(Maybe your gf dropped something into the PC? Oo? :)) – Shiki May 15 '10 at 7:40
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4 Answers

up vote 9 down vote

Probably a fan. It's a bit unstable when cold, but when "kicked" it runs smoothly.

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So do I need to replace the fans? What do I do so that I could conclude that its actually a fan problem – soul May 15 '10 at 7:13
Put your finger gently over the fan. Apply pressure lightly-progressively, stop the fan (even CPU fan can be stopped for a few sec, dont worry). Listen. If the noise is gone, buy a replacement and go for it. (Also, you can apply grease on older fans like old GPU fans where replacement is a no go.) (And hell yeah you can kick the PC also which is more fun but its a bit risky. >.>) – Shiki May 15 '10 at 7:38
My PSU fan is like this. I just launch some power consumer (gpu tester, cpu burner) and after a few second its gone. :P Well. Chieftec PSU..what did I expect? ^^" – Shiki May 15 '10 at 7:39
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up vote 3 down vote

Yup, I agree with Ignacio. It's probably a fan.

Might want to look at 'em. Dying fan can be a problem on a newer computer. I just had a recent RAM problem that ended up being attributable to a "hot spot" that built up because a fan wasn't running, and that's with no overclocking or any sort of weird heat-related nonsense.

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up vote 2 down vote

It might be a fan or disk in DVD drive. Both can make quite a lot of vibrations, and while fans just tend to run smooth after a while, DVDs get checked on boot and then stay unused. So symptoms would be the same.

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up vote 1 down vote

Have to agree with the above and add that in the olden days when they started putting fans on the CPUs because of heat problems, I was replacing the fan once a year whether it needed it or not because they were going out every couple of years or less.

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