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Cpu fan failure

April 11, 2009 at 09:14:24
Specs: Windows XP SP2, Intel core 2 duo E43

My cpu fan starts trips and goes off.so my system shows error msgs and then shuts itself down.what could be the problem..for the past one month or so i have been getting error msgs about some CRC incompatibility of my computer bios.also sometimes my cpu starts by itself when i switch on my ups but not the computer power button.is this a problem with my power supply unit.thank u

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#1
April 11, 2009 at 10:14:56

You may have a poor connection inside your computer case somewhere.

Unplug the case/power supply.
Power off your monitor.
Open up the case by removing the left panel as seen when you're looking at the front of the case.
Check all the connections of the wiring to make sure they are all the way onto their pins and into their sockets, especially the main connector from the power supply. The wires close to the mboard going into the main power connector/socket should be more or less perpendicular to the mboard surface rather than at an angle. Make sure all cards in slots are all the way down in their slots.
.....

While you're in there, if the cpu fan/heatsink has mung (dust, lint, etc.) on it, clean it off, but DO NOT use a vaccuum cleaner to do that (they produce a tremendous amount of static electricity when running, and anything connected to them can discharge that to your components) - use canned air, or an air nozzle if you have access to an air compressor, or an artist's brush that can be used in small spaces, etc. It may be difficult to clean the top of the heatsink under the cpu fan - the most likely place to have mung on it - and the bottom side of the cpu fan blades unless you remove the fan. If you have a case fan, clean that too if it needs it.

With the cover still off, restore the AC power, start the computer and make sure the cpu fan spins - if it doesn't spin don't use the computer until you have replaced it.
If it spins too slowly, and/or if it makes rattling or screeching noises, most likely to be noticed when the computer has cooled to room temp, has not been used for a while, and then is started up, the cpu fan's bearings are failing - replace it as soon as you can.
.....

See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:
http://www.computing.net/hardware/w...
......

Usually if you have a power supply problem the cpu fan either works or it doesn't, but you could ...
Check your PS.
See response 4 in this:
http://www.computing.net/hardware/w...

There is no info about your exact model on the HP site, and what SR5060 models there are listed have no info about the power supply used in the system. If you need to replace it, find the Compaq/HP part number on it on a label - xxxxxx-xxx - and quote it here in this topic.
Usually you can replace it with any standard sized standard ATX PS.
Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Don't buy an el-cheapo PS.
See response 3 in this:
http://www.computing.net/answers/ha...


Those SR5060A* models have an Athlon mboard and use 64X2 cpus.

Apparently your SR 5060 il model has
Intel Core2duo 1.8ghz
Intel 945G chipset
etc.
http://ca.wrs.yahoo.com/_ylt=A0oGk2...

Those SR5060A* models have a PCI-E video card in a slot.
If your mboard does too, the original power supply capacity is adequate, but if you have changed which video card it has in it, or if you want to be able to install a better PCI-E card in the future...
Your power supply must have at least the minumum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD!)
You can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements.
If you want to cover any possible video card, a minimum 600 ot 650 watt power supply will handle any current high end video card, or even a X2 card (two video chipsets on one card) or two cards in two slots.
......

"sometimes my cpu starts by itself when i switch on my ups but not the computer power button.is this a problem with my power supply unit"

Not necessarily; probably not.
Sometimes just the electrical "noise" created when you switch on the power to a UPS or a power bar or an anti-surge power bar you have the computer plugged into will cause the computer to start up.
I have an anti-surge power bar switch that sometimes causes that, but it only does it with one of the two computers I have connected to that power bar.


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#2
April 11, 2009 at 10:34:10

Thank u for the loads of information.i already opened up my case and tried almost everything.every cord seems to be perfectly connected.the fan or the motherboard has no dust at all.coming to the bios problem after everytime my cpu starts by itself my system shows checksum error in the bios.after that it loads the default values and boots up.the system date is set back to 2007.so i think this problem is responsible for the failure of the fan.also i recently bought nvidia 8600 gt.the problem appears after i fixed it in my computer.does it has anything to do with the failure or the bios error.my psu is rated 400 watts and the minimum requirement for gpu is only 300.thank u again for taking pains for me

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#3
April 11, 2009 at 19:33:36

OK then, you're getting the message every time you boot "cmos checksum error" or similar and the time, date, and all other custom bios settings are set to defaults because your mboard's cmos battery is
- too weak or dead (most likely)
- or - it's installed upside down in it's socket - + is supposed to be on the top if the battery is flat on the mboard, or outwards if the socket is vertical, so you can see + when it's installed.
- or - one or both metal contacts that make an electrical connection with the battery are bent or are corroded

and because of that the cmos settings are lost every time you power off the computer.

However, I haven't ever heard of that making the cpu fan stop spinning, although that may be possible with some mboard bioses.

It's likely you need to replace the mboard's cmos battery, or fix whatever else is wrong with it's connection.
Unplug the computer or switch off the ACpower to it. It's usually held down by means of a slightly spring loaded clip - move the clip away from the battery and it should come out easily. Usually it's a 2032 or a 2016 - some dollar stores have them.

The first time you boot after you correct the battery prblem, you will get the "Cmos checksum error" or similar message - go into the bios and set at least the date and time, and you won't get the message while booting again after that.

One thing I neglected to mention is the cpu fan must have 3 or 4 wires and it must be connected to a header for the cpu fan on the mboard that has 3 or 4 pins. If the fan has 3 wires, the header 4 pins, the 3 wires must connect to the right 3 pins of the 4. Most recent mboards will shut down automatically within a very short time if no rpm is detected from the cpu fan header wiring connection.


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Related Solutions

#4
April 11, 2009 at 20:38:32

"CRC incompatibilty" seems to indicate to me that the BIOS chip on the motherboard may be corrupted. This would cause a CRC checksum to fail, and also to cause glitches with the CPU fan, since the BIOS can control it. The only way to fix this would be either to get a new motherboard or PC, or desolder the old BIOS chip and solder a new one of the same model on there. The latter would be impossible to do unless you're good at soldering and would be able to get a BIOS chip of the same exact type. Some motherboards have sockets that the BIOS chip fits in. If that's the case with your motherboard, then soldering wouldn't be necessary. It would just be a matter of finding the exact chip to replace it.

If your problem really is a corrupted BIOS chip, it may not be worth it trying to find a different BIOS chip to replace it. It may be time for a new system altogether.

WinSimple Software


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#5
April 11, 2009 at 20:54:01

The checksum error appears only after the cpu starts by itself.if the bios is corrupted then it should show the error everytime i boot it.isnt it?.also my hardware is still covered under warranty.so i will get it replaced if it is corrupted.the problem started to appear after i got the gpu only.could the gpu be responsible for this. Can the battery get weak within 2 years?.

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#6
April 11, 2009 at 21:49:41

It is many times more likely you have a cmos battery problem or a problem with the new graphics card than your bios is corrupted as Rayburn suggests.

It would help if you quoted the exact message you're getting,

If you have a cmos battery problem, "cmos checksum error" or similar only appears after the computer is shut off and then you start it up again, or some event such as you switching on the UPS starts it up again . The bios will retain the time and date settings, etc., you made while the computer is running and when you reboot the computer.

If you think the newer graphics card is the problem, if you still have the old one, try un-installing the new one, install the old one.

"also my hardware is still covered under warranty"

I doubt that unless you bought an extended warranty when you bought the computer.

"Can the battery get weak within 2 years?. "

They usually last up to 5 years, but as I said, the battery could be upside down, or the contacts touching the battery may have a problem.


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#7
April 11, 2009 at 22:09:14

"It is many times more likely you have a cmos battery problem or a problem with the new graphics card"

True, but things can happen. I thought it was worth mentioning anyway. Usually CRC refers to a checksum. And if the checksum failed, then that *usually* indicates corruption somewhere, hence my suggestion.

But yeah uninstall the old card and install the old one if you have it. I don't see how a video card could cause the error, but like I said, anything can happen.

WinSimple Software


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#8
April 12, 2009 at 02:18:49

Yes the checksum error was appearing only after i had left the system without power for atleast a full night.so i guess it is a cmos battery problem.yes my hardware was covered under extended warranty for 3 years.but now the problem is with my fan. Since it doesnt work the system is automatically shut down.i opened the cabinet and switched on the system. I was able to see the fan starting up pretty well and then going off.can this be a defective fan or something else. All the connections in the motherboard are perfect especially the ones of the fan. Is there a way to find out whether my fan is faulty or not. Also i cant disconnect the fan because there is a sticker saying warranty void if seal is broken.thank u guys for all ur help.

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#9
April 12, 2009 at 09:17:59

The cpu fan is quite simple - it either works or it doesn't.
If there's nothing physically wrong with it's wires or the way they're connected to the proper cpu fan header, and if it doesn't make any rattling or screeching sounds, if the fan spins at all there's probably nothing wrong with it.

I've never heard of a malfunctioning cpu fan causing the bios cmos settings to be set to defaults, but in theory it's possible a too weak or dead mboard cmos battery, or a poor connection of it to it's socket, or the battery installed the wrong way, could produce a false cpu fan message and cause the mboard to shut down.

You definately have the symptoms of a cmos battery problem.
If you replace the CR2032 battery, or fix whatever is wrong with the way it is installed, in theory all your problems should disappear.

I determined previously that your SR5060il is a HP/Compaq Asia-Pacific region only model.
Since that region includes Australia, on the HP web site I set the country to Australia and then looked for support info for SR5060il.

HP Australia

Compaq Presario SR5060IL Desktop PC (support)
http://h10025.www1.hp.com/ewfrf/wc/...

Manual
Upgrading and Servicing Guide (rather generic)
http://h10032.www1.hp.com/ctg/Manua...
The last thing in it is how to remove and replace the CR2032 battery, but it has no pictures

Motherboard Specifications, 945GCT-HM (Livermore)
http://h10025.www1.hp.com/ewfrf/wc/...

"Motherboard description
Motherboard manufacturer's name: ECS 945GCT-HM
HP/Compaq name: Livermore-GL6 "

Mboard diagram shows a 4 pin cpu fan header.
The cpu fan MUST be connected to that.

"Video graphics
Integrated graphics using Intel GMA 950
Use up to 256MB of PC memory (with 512MB or more total PC memory)
Also supports PCI Express x16 graphics cards

NOTE: Either integrated graphics or the PCI Express x16 slot are usable at one time; they are not usable concurrently."

Your model may or may not have come with a PCI-E X16 graphics card installed in a slot.
Since the mboard has integrated graphics, when you have no PCI X16 graphics card installed you could try connecting your monitor to the vga port on the mboard.

Generic - how to remove and replace the ram modules:
http://h10025.www1.hp.com/ewfrf/wc/...

Error: CPU Fan Failed
http://h10025.www1.hp.com/ewfrf/wc/...

See this and make sure the wiring from the cpu fan is connected properly.
Motherboard (CPU) 4 Pin Fan Connector Pinout
http://www.allpinouts.org/index.php...
It is a good idea to unplug the wiring connector and plug it back in, in the unlikely but possible case the connector merely has a poor connection to the pins, which could cause your Error: CPU Fan Failed problem.
The pins on the header are closer to one side than the other, and so are the holes in the female wiring connector from the fan, and the female wiring connector usually has external ridges that line up with a plastic tab on one side of the socket, so the female connector can normally only be installed correctly one way, but it's quite common for the tab to be broken off, and you can install the female connector backwards in that case, or you can install a female connector with 3 wires/holes on the wrong three pins of the 4 pins.

Error: CMOS Checksum Bad
http://h10025.www1.hp.com/ewfrf/wc/...

Removing and Replacing the CMOS Battery
http://h10025.www1.hp.com/ewfrf/wc/...



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#10
April 12, 2009 at 14:14:20

Rayburn

""It is many times more likely you have a cmos battery problem or a problem with the new graphics card""

"True, but things can happen. I thought it was worth mentioning anyway. Usually CRC refers to a checksum. And if the checksum failed, then that *usually* indicates corruption somewhere, hence my suggestion."

In my experienceand from what I've seen on the web, 99% of the time a checksum error relates to a cmos battery problem, or the flashing of a bios that failed, or in a few cases a floppy data cable that was connected wrong, in which case it was a false error.
I've fiddled with many mboards, and there has only been one that spontaneously developed a corrupted bios (PCChips M500) for no apparent reason.

"But yeah uninstall the old card and install the old one if you have it. I don't see how a video card could cause the error, but like I said, anything can happen."

If the video card was damaged, e.g. if he didn't remove or switch off the AC power to the power supply when he plugged it in or unplugged it - it's possible that could cause a checksum error, amongst many other possible random symptoms.



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#11
April 12, 2009 at 17:52:03

"I've fiddled with many mboards, and there has only been one that spontaneously developed a corrupted bios (PCChips M500) for no apparent reason."

Yep that shows that it's indeed possible even if it's rare. That's why I thought it was worth mentioning. I probably haven't messed with as many mboards as you, but I have come across a few with a corrupted BIOS.

"If the video card was damaged, e.g. if he didn't remove or switch off the AC power to the power supply when he plugged it in or unplugged it - it's possible that could cause a checksum error, amongst many other possible random symptoms."

I don't understand this, especially since the OP isn't complaining of video problems or worse. Usually a faulty video card means random restarts, etc. But how can a video card work fine but still be "faulty"? That's why I'm having a hard time understanding.

WinSimple Software


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#12
April 16, 2009 at 23:25:55

the problem has been fixed, guys...thank u all for all your kind help.it is a problem with the cmos battery terminals only..nothing was wrong with my fan or the battery.

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#13
April 17, 2009 at 03:42:07

Have you ever changed any hardware inside the case? Like CPU or hard drive? Or added a second hard drive?

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