Help! My Katana Scythe 3 stopped spinning all of a sudden?!

Yesterday everything was fine, today my PC shut down without warning 2 times, so I took a closer look inside and noticed my Scythe Katana 3 CPU Fan that I used to cool my AMD Phenom 9950 is not even trying to spin. It's barely a year old, and that it does not even try to spin up strikes me as very weird. Nothing has changed since yesterday that I am aware off.
I'm using the MSI K9A2 KF-F as my motherboard and the Be quiet! Dark Power Pro BQT P9-550W is my PSU. Is there still anything I could try before I go buy a new fan? Like I already said, that it would just stop working without giving a fight strikes me as very unusual and makes me doubt whether it is really broken or not.
Help would be much appreciated. Wish you all a nice and hopefully trouble free weekend.

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The test is pretty simple.

Take the fan to a bench and apply power to the fan. If it does not spin, it's dead.

Sorry if this is too basic for some. But it's a simple bench test that I've done too many times.

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What bench..?

I'm assuming you mean that I am to apply a power source to the fan outside of my PC tower? How precisely am I to do this? I may have a 9V block battery and I may also find two suitable cables. Will that work or can 9V damage the fan (assuming it's not dead yet?).
Also, there are four connections for the fan, not just two. Probably some of them are for spin speed or temperature management? Will I damage the fan if I connect the battery to the wrong two connections?
Also I don't want to modify the fan or it's cables itself in any way because I'm not confident about returning it to it's original state.

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But some basic electrical or electronic skills are required to do such tests. Since 9V is usually too low to spin a 12V fan the worst that can happen is it won't spin. And all the fans (many thousands over a few decades) take the power either way, I can only think you are very new to this.

Sorry but you have to start somewhere. I was under the impression you repaired PCs but it looks like you don't. Why not replace the failed fan?

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Guess I will have to replace it then. Thanks anyways.
And here's one more personal advice from me to you: by saying "sorry" like that you make the person without the skills more aware of the lack. Maybe next time try saying something like "so it seems you don't have much experience repairing PCs ...". I would probably feel less wounded that way. It wasn't a big deal, but i did feel a little sting when I read it the way you wrote it.

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I try to avoid that.

But I fail at times. I like to read where people are doing their own work but learning the basics of electrical work is a wallet saver. Even if you didn't test the fan, replacing it yourself is a trivial PC task and can save you 100 bucks over a shop fee.

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If it were mine....I'd just replace the CPU HS Fan. The

fight or the warning is ....the system either beeps providing the feature is turned on or it shuts down to protect it from further damage.

Let us know how it works out.


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Re: stopped spinning all of a sudden

That can happen with hardware, that it just stops for some reason. If it didn't we could all be driving a T-Ford and viewing a B&W television (because they didn't stop working either).


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