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CPU dead after fan error

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August 16, 2013 9:06:56 PM

hi, i just cleaned my PC and when I tried to turn it on, it says cpu fan error.. after searching on the web, I think I finally find the answer and tried to reconnect the cpu fan to the connector but now my PC won't start.. :( 

I use Mobo ASUS P5G4IT-M LX3 with Intel Xeon..
Can anybody help, please?

More about : cpu dead fan error

a b à CPUs
August 16, 2013 9:10:22 PM

did you plug in your cpu fan correctly?
August 16, 2013 9:13:22 PM

I think so.. I have a blue fan on top of the processor, I connect it to cha_fan because it has 3 pins.. My cpu_fan connector has 4 pins, so I plugged it with another fan I had.. In total I have 3 fans in my CPU..
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a b à CPUs
August 16, 2013 10:40:25 PM

nono im asking if you plugged this fan, that is ontop of your CPU, (HEATSINK) is that plugged into your CPU FAN 4 pin port of the motherboard
a b à CPUs
August 16, 2013 10:50:45 PM

blackangel21 said:
hi, i just cleaned my PC and when I tried to turn it on, it says cpu fan error.. after searching on the web, I think I finally find the answer and tried to reconnect the cpu fan to the connector but now my PC won't start.. :( 

I use Mobo ASUS P5G4IT-M LX3 with Intel Xeon..
Can anybody help, please?


Do the fans even start to spin when you turn it on?

This may be a long shot but I've had it happen TWICE this year when cleaning a computer. The Power Supply decided to die at the same time. Swapped in a new PS and it booted just fine.

.. or you forgot to plug the power cord back in. :) 
August 16, 2013 10:54:06 PM

No, strangely the blue fan that is on top of the CPU only have 3 pins so I kind of can't push it to the 4 pins connector..

Anyway, the problem now is that my PC won't start at all.. The CPU led is on, but nothing happened when I pressed the power button..

P.S sorry if I'm a bit slow, I don't know much about PC, this is the first time I unplugged processor and motherboard to be cleaned..
August 16, 2013 10:58:02 PM

@Cazalan: at first no, then I plugged it in to the CHA_FAN and it did start but I still had the CPU fan error warning so I opened it once more and when I tried to assemble the entire thing it just won't start..

Hmm, it might come from the power supply because I checked all the cord and switch and set it to on.. :)  How much do those thing cost?
If it comes from the Power Supply, how come the CPU led is on? Shouldn't it be off?
a b à CPUs
August 16, 2013 11:48:18 PM

Hard to say. No beep codes or debug leds for that mobo. A cpu fan/power error may need a full power cycle.

Unplug the power cord for a minute, plug it back in, and try starting again.

If that doesn't work then you probably do need a new Power Supply. They're often the first thing to go on an older PC.
August 16, 2013 11:57:17 PM

This may sound like a strange solution, but try this: disconnect your PSU connector from your motherboard (the one to the actual motherboard, not the one that goes to the outlet.).

The same thing happened to me when I was cleaning out my in-laws' ancient office PC. Disconnecting and reconnecting the PSU from the MOBO worked for me. Good luck.
August 17, 2013 2:03:57 AM

@Daniel: thanks for the solution, however I'm having trouble disconnecting it. It's like this bunch of cables squeezed together through a single connector and it's really hard to pull.. Since I'm afraid I'll damage the mobo if I pulled too hard, can you tell me how to disconnect the connector safely?

@Cazalan: at first, I used a backup PSU but now I plugged the CPU straight from my electric socket still nothing happened. If the Power Supply is the problem, can I do something to fixed it temporarily?
a b à CPUs
August 17, 2013 3:09:53 AM

ATX cables have a latch in the center on one side. You have to squeeze it before pulling.



August 17, 2013 3:36:07 AM

@Cazalan: thank you very much for your solution man.. I unplugged every cors and wait for about 5 mins, works like a charm..
!