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Author Topic: Why does the fan on my computer make this loud noise?  (Read 33567 times)

Offline turnipsock

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Why does the fan on my computer make this loud noise?
« Reply #25 on: 13/05/2009 14:31:46 »
(Not that I am planning on doing this) If I left the fan as it is for say, another year, will my computer crash?

If its the processor fan then the PC will shut down without any warning in order to protect the processor. This could happen when you are in the middle of a document and you will loose all unsaved work. (this is assuming that the fan actually jams)
 

Offline RD

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Why does the fan on my computer make this loud noise?
« Reply #26 on: 13/05/2009 16:24:50 »
You could record what your "crazy" fan sounds like and link to a recording of it on a file sharing site or Freesound*.

[* Freesound has a 24 delay from submission to the post appearing due to moderation]
 

Offline syhprum

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Why does the fan on my computer make this loud noise?
« Reply #27 on: 13/05/2009 18:17:42 »
We appear to be discussing two different things here the noise from the PSU fan and the noise from the CPU fan, the noise from the CPU fan will change slowly reacting to the temperature change due to the workload but the noise from the PSU which is not software controlled will change on its own whim, make sure you know which is which before spending time and money.
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #28 on: 14/05/2009 07:19:26 »
You could record what your "crazy" fan sounds like
Strange thing is, it hasn't happened once in 7 days.
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #29 on: 14/05/2009 07:21:07 »
We appear to be discussing two different things here the noise from the PSU fan and the noise from the CPU fan, the noise from the CPU fan will change slowly reacting to the temperature change due to the workload but the noise from the PSU which is not software controlled will change on its own whim, make sure you know which is which before spending time and money

Here is where the fan is:




 

Offline syhprum

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Why does the fan on my computer make this loud noise?
« Reply #30 on: 14/05/2009 09:22:47 »
A complete PSU does not cost a fortune and reqires little skill to change, 370 Watts should be more than adequate unless you have some fancy video board for playing games.

http://www.maplin.co.uk/Module.aspx?ModuleNo=35345
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #31 on: 14/05/2009 09:32:08 »
Hmmm...that's about $64 dollars here.
 

Offline LeeE

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Why does the fan on my computer make this loud noise?
« Reply #32 on: 15/05/2009 01:55:43 »
Jeez - I answered this question as the first response in this thread - I can't believe that people are still discussing it - well, I can because they are, but what is the point?

I'm reminded of Douglas Adam's observation, via the character of Ford Prefect, that humans talk incessantly to stop themselves from thinking.
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #33 on: 15/05/2009 10:37:35 »
No offense but it's always better to get a few more opinions and thoughts right?
 

Offline Karen W.

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Why does the fan on my computer make this loud noise?
« Reply #34 on: 15/05/2009 11:53:41 »
I think so.. so just unplug, remove the back clean the fan out with a soft bristled small paintbrush and acum up, put a few drops of oil at the point of turning, wipe off excess oil drips, and hand turn the fan a couple times wipe off any dirt that drizzles out .... put it all back together plug back in and try it for a few weeks see if it helps..I clean my fan like that every couple months!
 

Offline syhprum

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Why does the fan on my computer make this loud noise?
« Reply #35 on: 15/05/2009 14:21:23 »
There is of course no back to remove from a PSU , you must open up the computer, remove the PSU, dismantle it, then unscrew the fan from the case of the PSU then you can see about cleaning and oiling it not a job for anyone who does not have technical skills.
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #36 on: 15/05/2009 14:23:04 »
Correct, I mentioned that in one of my earlier posts.
 

Offline Karen W.

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Why does the fan on my computer make this loud noise?
« Reply #37 on: 15/05/2009 23:46:31 »
There is of course no back to remove from a PSU , you must open up the computer, remove the PSU, dismantle it, then unscrew the fan from the case of the PSU then you can see about cleaning and oiling it not a job for anyone who does not have technical skills.

 I AM TALKING ABOUT TE CASE ON THE CPU...NOT THE PSU! MINE IS ACCESSIBLE AFTER REMOVING THE SIDE AND REMOVING IT FROM THE BACK AND UNPLUGGING THE WIRING HARNESS THAT IS PLUGGED IN. It is very simple unless you do not even know the basics..but I like taking things apart! sorry about caps..it was an accident on my phone keys...
 

Offline Edster

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Why does the fan on my computer make this loud noise?
« Reply #38 on: 30/05/2009 03:28:27 »
Lots of sense in there. From years of having to resurrect fans in irreplaceable kit may I add my 2 Pennyworth? (insomnia rules, my noisy neighbours crashed home about 1/2 hour ago  so I`m done for tonight)
It is normally only sleeve bearing fans that make the screaming noises. Ball race fans tend to stall with nothing more than whirring noises as a warning.

The wear in a sleeve bearing fan eventually manifests itself by "Hula hooping" in part or in full on startup, a cotton bud  momentarily poked in the `ole wil partly stall it and make it rotate normally and stop the ruddy noise.

Smaller fans such as 2 cm ones fitted on some magoptic drives have the worst noise, and can make shrillness after only 2 years continuous.
 
I will expand on what has been said.
If you want to re lubricate the fan it is possible to double its life, If you can get to it. the quality of the oil is very important, i`m sorry but 3 in one is not a good idea.

Decent oils are all clear not yellow. Like typewriter oil or remington shaver oil If you have these they will do.

If you are going to buy then I swear by starret tool oil. ( as used on my precision measuring tools)  The yellow oils are not tremendously pure and some of the compounds attack plastics. If it is too viscous the fan will slow too.

Before you start have a soft brush, a vacuum cleaner, methylated spirits, cotton buds on hand. Tweezers And a shiny sticky label sheet to park the bearing foil. Number one is get the dust off BEFORE you lift the bearing foil.
 Once clean foil off and away from oil. I tend to use a cocktail stick to apply tiny amounts and rotate, until you can just see a liquid film.

Many current sleeve bearing fans use a black split poly washer on the shaft to retain it. You will need tweezers to take it off in many cases If you can`t see the bearing gap. The fan rotor will try to drop off! if it is a circlip then tweezers or pliers or a jewellers screwdriver and a white sheet as it will go ker-ping!

So you have sight of it, a tiny fraction of oil, turn, check again until you just see a meniscus moving as you wobble the fan shaft. pop the washer back with the tweezers, and wipe with a cotton bud. Then with a meths wet one wipe the mounting for the foil clean, and stick it back on when dry. That keeps it stuck so no dust.

I know a complete heathen who uses an ink refill syringe to inject through the ally foil cap, but gets about a year only.

If the play is excessive then I have tried mixing locksmiths graphite with the oil, but it may take 3 tries and flush out with meths between to get the right "feel" this works better on all ball bearing fans where the cage has worn causing the noise.

 It is a so and so to apply but flush the oil and Dry powder (teflon) lubricant the non domestic sort from RS or Farnell does the biz on ones that oiling hasn`t cured.

Bits of kit like a logo generator fitted and forgot as there is a spare cause a crisis when the spare hasn`t been powered for 10 years and the caps have lost their forming and you have to repair the screaming fans for the only working one.

First had to get involved in this area  20 odd years ago on a PDP 11 peripheral.

Hope that has helped a bit.

A new 400W PSU comes in at around 20-25 at a computer fair for a brand, Don`t even think of Maplins they stopped being remotely competitive about 15 years ago and low stock levels.
( I used to visit them as kid in their ONLY shop in westcliffe (southend) for project bits)

Have a look at CPC(.co.uk), apart from the small order charge they are often nearly as good as the fairs.
Gnight and happy ventilation

« Last Edit: 30/05/2009 03:35:33 by Edster »
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #39 on: 30/05/2009 05:56:30 »
Wow, thanks! If I could give you karma points I would give you 10. :)
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #40 on: 02/06/2009 09:27:30 »
a cotton bud  momentarily poked in the `ole wil partly stall it and make it rotate normally and stop the ruddy noise.
I missed this part before. Wow, I had no idea!  :o
I just tried it this morning and it worked, and I thought I was onto something, but obviously it is old practise.  :)
 

Offline Yomi

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Why does the fan on my computer make this loud noise?
« Reply #41 on: 02/06/2009 09:32:19 »
nice idea I think I should try this once
 

Offline Edster

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Why does the fan on my computer make this loud noise?
« Reply #42 on: 02/06/2009 21:31:10 »
 Be gentle it just needs a touch (no fingers!) :D

That`s a get through a day fix only, it`s still worn and needs some lubrication or replacing.
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #43 on: 08/06/2009 07:54:40 »
Alright, I have screwed my courage to the sticking place and done it! SO hopefully it'll be fine now.
 

Offline Yomi

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Why does the fan on my computer make this loud noise?
« Reply #44 on: 08/06/2009 08:15:28 »
We appear to be discussing two different things here the noise from the PSU fan and the noise from the CPU fan, the noise from the CPU fan will change slowly reacting to the temperature change due to the workload but the noise from the PSU which is not software controlled will change on its own whim, make sure you know which is which before spending time and money

Here is where the fan is:





Is this yours CPU dude ..........
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #45 on: 08/06/2009 08:18:47 »
That is correct.
 

Offline Yomi

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Why does the fan on my computer make this loud noise?
« Reply #46 on: 08/06/2009 08:20:31 »
Ah! I guessed it right ....... Well keep it safe.....
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #47 on: 08/06/2009 08:22:20 »
Ah! I guessed it right

Well it was hardly a light bulb moment.
 

Offline Yomi

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Why does the fan on my computer make this loud noise?
« Reply #48 on: 08/06/2009 08:24:00 »
lol
 

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Why does the fan on my computer make this loud noise?
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