Ok, so your power supply fan has started making that BRRRrrrrRRRRrrrrrRRRRrrRRRRrrrr noise, and it's running slow.
Maybe the fan has stopped altogether.
Taking your computer to the shop is expensive, and most just replace the power supply anyway.

Well, here's the quick fix that you can do with things you may already have - and WITHOUT screwdrivers!
Done right, the repair takes under a minute, and can increase the life of a fan by years.

First, let's look at these fans and how they work, and what makes them fail.

Step 1: Sleeve Bearing Fan

This is a typical sleeve bearing fan. The shaft fits very snug inside a "tube" or sleeve.
The shaft as it rotates glides inside the bearing on an extremely thin layer of lubricant.

The lubricant is held in by a rubber grommet (plug) under the sticker on the fan. Some don't even have the rubber grommet, and just the sticker holds the lubricant in.

The problem is, eventually this lubricant escapes, suffers viscosity breakdown, or just dries up. Please note that vegetable or olive oils will suffer viscosity breakdowns faster than oils that are meant to be lubricants.

If you have removed the power supply, opened it up, and removed the fan, you can oil it in this area, then put the grommet (if it exists) and sticker back in place.

But what if you don't want to go through all that work? There must be an easier way, right?

Step 2: Too Much Work!!!

Let's face it, if your computer looks anything like mine does, you really don't want to disconnect everything just to fix a sticky fan, or even to replace the power supply!
On my system there's the motherboard connection, and then power for 2 case fans, 5 hard drives, 1 SSD drive, and 3 optical drives.
That's a lot of cabling to mess around with just for a fan fix, and then I'd have to make it all look this neat again after I put it back together.
There's GOT TO BE an easier way........

NOTE: If your fan looks like the one pictured here, you WILL need to take off the side panel and lay the PC on the other side, but the fix will still work. Unfortunately you may need a screwdriver to take off the side panel! LOL!

Step 3: The Quick Fix That Lasts

I suggest sewing machine oil if you can find it, but most lubricants (NOT WD40 - that's not meant as a long term lubricant) will work.
Motor oil is a bit thick for our needs, so only try that as a last resort.

First, let's see if your power supply qualifies for this fix.

Looking at the back of the power supply, see if there are 4 holes at the centre of where the fan mounts.
If they aren't there, this won't work.

Step 4: The Trick...

Now you need a syringe or a precision oiler like the one here. These oilers have a blunt end though, so you'll need to file it on an angle until it resembles a syringe tip.

Now, going on about a 45 degree angle from one of the upper holes, punch the needle through the sticker and rubber grommet and squeeze in some oil. 
If there is no rubber grommet, the oil may start to leak out the hole you just made...as soon as it does, remove the needle.
If there is a rubber grommet, just squeeze oil in and remove the syringe as you do so. The grommet will seal up as soon as the needle comes out.

Now power up the unit, and let the oil work its way into the bearing.
Fans with rubber grommets last years after doing this. Those without vary in how long they last afterwards - but hey, you can just do it again down the road!
If you can manage to get some tape over the hole you made, it'll last longer than if you don't.

If the fan is one that has completely seized up, you'll need to move the blades back and forth until the fan starts to spin on it's own. I find a Popsicle stick is good for this procedure.

That's it, you're done, and didn't need your tool box, and probably didn't break a sweat.
Best of all, you didn't have to buy a fan, or power supply, or take it to a shop or spend a ton of time ripping it apart.
By the way, this also works for case fans if you can get the needle to the centre of the fan through the casing.
<p>Worked great for me. My PC is quiet again.</p>
<p>will this fix a loud PSU?</p>
if the noise is coming from the fan, then yes, this is exactly what I developed this technique for.
<p>thanks tho and yeah the noise is from the fan</p>
<p>Even if u do not have four holes , there is one practical idea. cut ribs at 3 points , as marked blue in yellow circles. Leave bottom point uncut as shown in green rectangle), Band the green point to downward ,lubricate fan , rebend the strip back again in original place. I did it successfully today &amp; noise stopped. Also, grill remained intact except having 3 cuts...!!!!!! to maintain vermin proof-ness function.</p>
<p>Yes, that would work too if you have something that will easily cut the ribs. Glad you found this article useful. When I was working as a tech and doing many machines a day, it saved me hundreds of hours of time, and saved the customers countless amounts from not having to replace their power supplies.</p>
yes, I could easily cut them with a plier, as they are small size &amp; much thinner in my case. God rid of the noise.
<p>I recently bought a Supermicro PWS-865-PQ power supply on eBay. It was <br>cheap, and I did not think that something should be wrong with the unit.<br> Only as it arrived, could I see a lot of dust in the PSU. So, I decided<br> that I open it and clean it with air and brush. However, the dust was <br>somehow strange. Guess what: the previous owner did something like the <br>thing in this article, but was not careful enough, and the fan blew a lot of oil into the PSU, which<br> acted as a glue on the warm (and warmer, warmer, hot, hotter...) <br>components. Luckily, this is a server PSU, and it has been made to be rock-solid even if one of the two fans fail, so it works well. But most PSU's are not as solid as my one. Please be very-very careful, if you apply this method, because the dust can block the heatsinks in the PSU, which can result in the overheating of the FET's, which can result in overvoltage, overcurrent, fire, explosion, etc, and the removal of oiled dust is a long and painful process.</p>
My power supply is not working how to fix please define it
replace the power supply.
A little tiny drop of olive or vegetable oil works nicely as well. Doesn't rot rubber as it's not petroleum based. <br> <br>if you do dismantle, just drop a tiny bit in off the end of a teaspoon. Been using this one for years and it works well.
I would like to point out that although I am picturing a power supply that has been removed from the case, the entire idea here is that you don't need to remove the supply from the case. When using the type of supply pictured, you don't even need to remove the side panels - absolutely no screwdrivers needed at all.

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Bio: Just getting into the microcontroller craze. I used to do this sort of thing building circuits for 8 bit microprocessors back in the early 80s ... More »
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