If the bearings need lubricated, would they still be running or running w/o any signs of distress? I looked at those; the power supply fan, the CPU fan, and an addl mini fan that I have sitting inside the case (I leave my sides off the case) and they are all running smoothly, quietly, and putting out air.
Do power supplies act up intermittently? I thot when a power supply went out, it simply went out.
Again, I don't mean to argue, I just need clarification. I will ultimately check out your suggestions too. Thanks!!
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Re: Thanks for reply, addl questions..
Hi again Tgeek,
Appreciate the postback.
In reply to your first query, yes especially those with 3-wire connection since they are variable RPM (depending on a heat sensor that dictates to what RPM the fan motor should rotate). If the PC is a couple of years, then cleaning and lubrication wouldn't do any harm but would maintain if not improve overall efficiency. Additionally, you have eliminated the possibility that the fan is the cause of the "screeching" sound.
Should problem persist (with the fan problem eliminated), then the only possibility left is as you suspected the SMPS (switch mode power supply). The SMPS operates on a frequency above the threshold of the human hearing. In some instances due to full load or no load conditions, the frequency changes (though they are supposed to remain stable). It is very possible for the freq to go down to a level that would be audible. Intermittent operation is not unheard of with PSUs and often the culprit are capacitors. However, often PSUs are no longer repaired but simply replaced.
Would appreciate another postback for any developments (or even the lack of it).
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If the bearings have worn, there is not much hope for lubricating as the bearings are sealed in the motor. Look on ebay for a replacement. The fan is attached to the heatsink that is attached to the processor on the main board. A time consuming job.
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Try replacing the cpu fan. The reason why the cpu fan is noisy its because the bearings are rusty and need some lubricants. But in this case you have to replace them. For me there's no need to upgrade your bios. Its just a hardware problem.
Have a look at this article, perhaps it will help you. A likely cause is newly installed hardware or drivers: See here and here
I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread. If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!
as fans with ball bearings in them operate, they gather dust. this dries out the lubricant in the bearings track. normally cleaning the fan would suffice to restore effectiveness just run a vacuum over the fan on a regular basis to stop the dust building up.
if you have added lubricant to the bearings you may find that more dust is now sticking to the dust that was already there reducing the fans effectiveness even more and causing more noise.
another possible reason for the increased noise is that when lubricating the fan, depending on how you did it, you may possibly have bent the fan's axle slightly again increasing vibration and noise.
personally I think it unwise to add lubricant to a ball bearing track such as that on a cpu fan as lubricants vary in viscosity and suitability for use and I wouldn't know which one to buy. If the axle has become bent, I believe it is possible to have it straightened but with the price of fans being so low I feel your best course of action would be to replace the fan and then make sure that your new fan doesn't get clogged.
They look different most likely because of your screen display. YOu have to adjust teh resolution of the computer ( Limited by hardware) Right click on the desktop then click properties you can adjust teh resolution there.
I hope this has answered your question sufficiently. If you have more questions please post a reply. Thanks.