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Comment from Gaurav on 2012-01-08

2012-01-08T15:26:59Z

Hey when i start my system it wont boot up and it is saying that sys fan-N/A. what should i do

Get the system fan repaired.

09-Jan-2012

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Comment from Lee on 2012-01-04

2012-01-04T08:46:41Z

I have a system fan has failed, get it serviced.
my cpu and case fan both work but sounded like it was the case fan so i took it out but still there now i think its the cpu fan but it works it just goes high and low on the sound and sometimes makes a blender noise. how do i fix it so is does not brake as i have has it sent to hp during the first 3 to 5 months i had it because it got so loud and grindy that it finally did not power up even to the bios and when i got it back it has worked until last year and i think those aio boot disk with pe on them are corrupting the hardware as they replaced the motherboard and hard drive but i tried to take the hot melted thermal compoun d of of the cpu and stil not doing right. Thanks for reading all of this and please reply asap. bye.

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Comment from Paul Clarke on 2011-12-24

2011-12-24T20:37:37Z

You mention having a fan over the CPU blowing cool air on it. While this is not the worst thing in the world, in 80% of cases ("cases" excuse the play on words) it's far better to have a fan taking hot air AWAY from the CPU.

The CPU heatsink and fan are pushing air in a specific direction - a fan blowing TOWARDS that is actually acting counter to the CPU's own fan. There is also the issue of blowing external dust and other particles directly onto the heatsink and CPU fan from outside the case.

Above the CPU have a fan blowing air out.

With modern high perfomence design or gaming GFX cards I would not go into the fray without at least 2 120mm fans - preferably 3 or even more.

One surprisingly good ploy is to have two side by side at the back of the case, the bottom one sucking air in, the top one blowing air back out.

In fact I would only even have one "input" fan on just about any set up. and then 2 or 3 output fans.

Rapid 120mm fans are great.

Finally, many cases have a lot of obstruction between the front input fan and the main heat generating area of the MOBO (HDD bays, lighting, cabling, optical drives, the butt end of a GFX card etc etc) It's often better to have fans on the back of the case where air flow between it and the components it is trying to cool is less obstructed.

Just to re-iterate though. ONE input fan (the lowest fan vertically) and 2 or more exhaust fans - set HIGHER than the input fan (remember - heat rises)

Great advice regarding cooling here though.
I've seen many a computer needlessly damaged for want of a couple of fans that probably wouldn't cost more than $15 for the lot.

Oh and DON'T PUSH YOUR PC INTO A CORNER - HAVE SOME AIR FLOW AROUND IT.

Paul

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Comment from Malcolm Walters on 2010-03-16

2010-03-16T15:04:55Z

I changed the battery in my computer now when I start it I get "CPU Fan failed" (but the fan is running) press F2 to enter bios however it shuts down before I can get into the bios. Can you suggest some way to get this fixed?

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Comment from anca on 2009-07-08

2009-07-08T07:58:24Z

I`ve got a warning! from easy tunes program :system fan=0.Please help me.Thanks!

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Comment from Pat on 2009-04-27

2009-04-28T02:25:58Z

My fan was running constantly. I restored the system to an earlier point and it seemed to go back to normal. Now it doesn't sound like it is running. There are 2 fans in my computer. How do I check to make sure they are running?I don't want to burn the computer up.

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Comment from Bren on 2009-01-19

2009-01-19T20:59:01Z

Okay, my computer won't boot up and says "check system fan, system fan failure." I have no problem checking it out and mine has 3 fans and all three are working, yes I have cleaned them all also so why do I keep getting this message if my fans are all in working order?

There's no way to know for sure without looking at the computer, but typically the connection to the sensor that monitors the fan, or the sensor itself, is broken. Could be other things, but that's most common.

- Leo
20-Jan-2009

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Comment from Leo A. Notenboom on 2007-12-14

2007-12-14T20:07:10Z

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It could be any of a thousand different things. I'd have you start with this
article:
http://ask-leo.com/why_does_my_computer_randomly_reboot_without_warning.html

Leo

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Comment from Tonia on 2007-12-13

2007-12-13T16:41:02Z

When I try to turn on my computer it will start to boot and then shut down and then start to boot and then shut down....and so on. Can you tell me what this could possibly be?
thanks
Tonia

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Comment from Bill on 2007-07-09

2007-07-09T11:02:29Z

Another great Leo article. Readers may care to download SpeedFan, a great little utility for keeping tabs on exactly what's going on. Go to...
http://almico.com/speedfan.php

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Comment from James Mahaffey on 2007-07-07

2007-07-07T16:46:09Z

I'm glad to see I am not the only one with questions concerning fans. I have a Dell Dimension 3000 computer which starts making alot of noise when the heat goes up. I only see one fan. Am I over looking something? I love this computer but this noise drives me crazy. What can I do other than buying a air conditioner for the room. I have this Multimedia Computer System which also has a Pentium 4 inside. I don't even know the name of this thing. It just shows Phonix on boot. They put 2)fans in this thing. Why wouldn't Dell do the same? If I buy another fan where would I mount it in my Dell? I don't want to blow the thing up. I'm sorry for the length, just want to clearly explain my confusion. Thanks

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