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Windows 7: PC makes grinding noise when turning on

13 Jul 2014   #1
Tomtom111

Windows 7 Professional SP1 x64
 
 
PC makes grinding noise when turning on

Hi,
Recently a grinding noise can be heard when I turn on my PC, but not always. So far it has happened twice, the first time I looked inside my PC but found nothing, and the second time it stop after about 5 minutes once the computer had been turned on. I have literally no idea what it is as nothing is touch any of the fans and both HDD's in my build feel fine when I rest my hand on them.
I've made a video of the noise, for which the link is below. You may have to turn your volume up slightly to hear it, but it is much louder in reality.
YouTube Video
Any help will be appreciated,
Tom


My System SpecsSystem Spec
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13 Jul 2014   #2
Computer0304

Windows 7 Professional 32-bit/Windows 8 64-bit/Win7 Pro64-bit
 
 

The CPU cooler is most likely loose because I've had a similar issue where when the CPU fan spins fast, it makes a similar noise.
My System SpecsSystem Spec
13 Jul 2014   #3
Tomtom111

Windows 7 Professional SP1 x64
 
 

But the cooler is clamped down to themotherboard... I'll check it but it seems unlikely, and also if the cooler was loose the noise would continue whenever the computer is switched on.
My System SpecsSystem Spec
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13 Jul 2014   #4
Computer0304

Windows 7 Professional 32-bit/Windows 8 64-bit/Win7 Pro64-bit
 
 

Well it depends on how loose it is. The cooler mounting could be getting loose. Sometimes it will go back in place and stop, and it can stop when the fan slows down.
My System SpecsSystem Spec
13 Jul 2014   #5
ignatzatsonic

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit
 
 

Disconnect your case fans one at a time and see if the noise disappears.

I listened to the noise. It's got a strong "rotational" component to it. Highly likely it's a fan of some type. It's not an electrical "humming" noise. The noise doesn't become audible immediately--it gets loud only after the PC has been on a few seconds.

Could even be a power supply fan or video card fan.

Could be a fan loose in its mounts, rattling as it speeds up.



Don't know what type of CPU cooler you have, but check the mounting of that fan too.

Less likely it's a hard drive issue.
My System SpecsSystem Spec
13 Jul 2014   #6
Ranger4

Windows 7 Home Premium 64 bit sp1
 
 

Tomtom11. Grinding noises are mostly always caused by some rotating part, usually a fan. Dry bearing are frequently the cause & getting any oil into them is almost impossible.
Fans are found in the Power Supply Unit, the CPU & often under the graphics card, which can sometimes be hard to see. Listen carefully close to each one. Sometimes you can disconnect the fan or momentarily stop it & see if the noise stops. The best solution is to replace the offending fan.
If you have additional case fans just disconnect each one in turn & see if they are the cause.
My System SpecsSystem Spec
14 Jul 2014   #7
Tomtom111

Windows 7 Professional SP1 x64
 
 

Upon close inspection, it appears that it is the front intake fan that is causing the noise. It was difficult to reproduce once I had removed the fan, but when it was still installed I was 95% sure that it was the fan. So I cleaned the blades and the casing and screwed it back into the case, just to see if that somehow would make a difference, and so far it hasn't made the noise. Before a final judgement is passed, I'm going to see if the noises returns in the near future.
Thanks for your help.
My System SpecsSystem Spec
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 PC makes grinding noise when turning on




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