Question about ASUS A8N-E Motherboard

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Warning: Your computer CHIP Fan Fail or speed too low.

HELLO! I need help!
The computer reboots constantly. I cleaned with a brush the fan and tried to make disable the "Chip fan speed warning", but still the computer is rebooting...
It tries to open windows and then fails...
What I can do? What is the problem with the chip fan? Do i need to replace it? What is the best I can do?
thank you,

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Soem times becasue of heat event system restart. Check your RAM also soem times it could be problem of RAM.

Posted on Jun 25, 2009


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Fan speeds don't drop and are constantly on full power.

Hello here is the homepage:

I had this problem on another pc, it helped by cleaning the whole pc out for dust, with compressed air.
And renewing the thermal paste, between the cpu and the cooling element.

Actual control of speed is base entirely on measured temperature at some appropriate point, and a setpoint. Whether 3-pin or 4-pin, the basic control strategy is the same. For the CPU, the temp sensor is built into the CPU chip. For the case or SYS_FAN or CHA_FAN, the temp sensor is built into the mobo at some point. In each fan control loop, the measured temp from its sensor is compared to a setpoint and used to slow down or speed up that fan.
HOW the speed of the fan is changed is what differs. On a 3-pin system, the mobo reduces the +12 VDC line voltage to slow the fan down. On a 4-pin system, that +12 VDC line is kept at that voltage always, but the special PWM signal is used inside the motor casing to control how much of the time that voltage is actually turned on to the motor. The chip using this signal is a simple on /off switch, turning on the feed of 12 VDC to the motor and turning it off again, very rapidly at the frequency of the PWM signal. That signal looks like a "square wave", except that is "% ON" is varied (not constantly 50%) to control fan speed.

Try also to upgrade the bios, and look for the settings for the fan.
Make sure the fans are connected right, to the mainboard.

Good luck

Jan 28, 2013 | Dell PowerEdge SC1435 Server

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Asus g51j overheating

When the CPU overheats then it will shut down (i.e. thermaloverload) and won't boot up again until it has cooled down. If this is theproblem is not fixed then the CPU will eventually fail.
A faulty fan causes the problem or the fan and heat sink assembly are cloggedwith dust.
Check the CPU fan to see if it spins freely, if not replace the fan.
If the fan and heat sink is clogged with dust the remove the dust and make surethe vents are clear and dust free. Use a small brush and can of compressed airto do this.

May 17, 2012 | ASUS Computers & Internet

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Cooling fan only comes on when engine starts to over heat .

Does it have an adjustable fan on it where you can set the temp that you want it to come on? The reason I ask is some people put them on there and if you buy it used later on this is a detail that often gets left out. check it for a control. If that not it it could be a thermostat sticking or a bad temp sending unit. Radiator may need to be cleaned and cored

Sep 19, 2010 | 1985 Chevrolet Corvette

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Lap top keeps rebooting

Sounds like it could be an overheating problem if it happens after a long period of operation. Try downloading a hardware control utility to check the CPU temperature and control fan speed. look here
Of course this assumes that you can reboot after the pc is switched off for a time.

Feb 10, 2010 | Toshiba Satellite A10-S129 Notebook

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Hi there.
Usually when the motherboard beeps there is a problem with some hardware or in most cases its the system memory that's at fault.
Get yourself a clean, soft, dry paintbrush, take the system memory out of the slots, clean the brass contacts on the memory sticks and also clean away any dust that may have built up on the slots that the memory goes into, after that blow any residual dust away and reseat the memory making sure its in nice and tight, then try to power up the computer.
Please post back with the results and if it still doesn't work please count the beeps and post back whether they are long or short.

Good luck and thanks for using FixYa!!

May 22, 2009 | Abit Fatal1ty AN8 SLi Motherboard

1 Answer

CPU fan fail or speed too low warning message.

For sure you have done something wrong in fixing up, re-check that you havent unplugged the fan aur havent damged the wires aur there jacks.
one possibilty maybe that you have cleaned the material present between fan and processor which is responsible for heat conduction.

Jan 29, 2009 | ASUS A8N-E Motherboard

1 Answer

Constant Rebooting and System Error Messages

I suspect you could have a heat sink fan not working remove side of case and when you turn computer on check fans heat sink and video card are working
With computer OFF
remove heat sink fan and check that the heat sink is not clogged up with fluff and dirt.
I regularly clean both fan and heat sink every 2 months also check the fan in power unit and blow it out

Aug 16, 2008 | Asrock P4V88 (P4V88 RAID) Motherboard

2 Answers

Cpu fan noisy/chip fan fail error messages


Yes. This sounds like a fan issue. The noise often comes from bearings failing within the fan. Also, a failing bearing can make things harder on the motor as it brings the fan up to speed. This is likely the reason that you see increased warnings during the fan speed check while booting because it comes to speed more slowly as bearing wear increases.

I give this a 90% chance that your CPU fan is causing the issue. Since a decent CPU fan will cost you ~$20 online, it's not much out of your pocket if you happen to uncover another culprit.

I'll keep an eye on this post. Let me know how things go.

Apr 03, 2008 | ASUS A8N-E Motherboard

1 Answer

Cpu fan noisy /chip fan fail

You must buy a new CPU Fan. You can get them HERE or a zillion other places on the Internet. You need a Socket 939 type fan that will handle your cpu speed. If you need help installing it, it may be in the manual. You can read the manual by clicking on the picture of your MB at the top of this post and then scrolling down.

Hope that fixed ya...


Apr 01, 2008 | ASUS A8N-E Motherboard

6 Answers

CPU fan fail or speed too low


I bought the same motherboard this past year (used) and installed it with AMD Athlon 64 fx-57, Antec P180 case, 550 w power supply. I had the case cover off to check the fans when I first fired it up. The AMD oem cpu fan hesitated at power on for a few seconds, which worried me. It started spinning normally and I then shut the system down and waited a few minutes before restarting it. It spinned up fine so I put the cover back on. I started getting the same error you mentioned, so I updated the BIOS to 1013 version. That didn't solve the problem. I ended up disabling the warning in the BIOS as I got tired of seeing it, as I could see the fans were all spinning and the CPU temperature was at about 26 to 34 on cold boot.

I recently checked on this problem and seems many others with this board have this problem. One fellow said he mailed off a question the the problem to ASUStek and they replied that it is just a glitch, that the fan is "smarter" than the BIOS, as it will hesitate to spin fully at start up if the CPU is cool. The suggestion was to disable "Q Fan Controller" in BIOS. I did and don't get that warning.

As for the yellow question marks under manage in Windows, you need to install the drivers for all of those devices, and they will be on the disk that came with the motherboard. I use the latest drivers from the ASUS site, but the only one I couldn't install was the ACPI ATK 0110 Virtual Device that came out in 2007. When I try to unpack the .rar file it says Corrupt Headers and refuses to use the driver from that file. So, I use the driver from the disk.

Apr 12, 2007 | ASUS A8N-E Motherboard

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