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Cpu fan starts at high speed when booting runs for 2 seconds and shuts off then continues to run for 2 seconds and off for about 6 or 7 seconds continually. This begans as soon as I hit the power button even before windows loads, There have been no hardware changes to the computer . Only software change was to reload the video driver for the nvidia geforce8800 I am wondering if the bios could have gotton corrupted but am a bit hesitant to flash it needlessly.

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  • 75 Answers

Clean your fan. check your power supply. if your power supply is good. check the memory module.

Posted on Aug 25, 2010

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Processor thermal treat error while booting


Make sure that cpu fans are running normally. Go to BIOS (generally with F2 on intel motherboards), and there will be information about cpu temperature, also fan speed (in RPM). If fan speed is 0 or very low problem is in cpu fan. (connection problem might be). If cpu fan speed is normal (high value) and cpu temperature is high, I will suggest you to open your PC case (or notebook) and see whether cpu fan is dirty or not. This is very common problem. If so, clean it.

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Won't start but CPU fan vibrates but will not go full blast. Intermittant


It appears you have a faulty CPU fan and it is causing the CPU to overheat and shut down.
I suggest you replace the CPU fan. remove any dust from the heatsink and put new heatsink compound on the CPU/heatsink.

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HP P4SD, its running good with 4 gb RAM, P4 3.0ghz, and a couple sata hd. The problem is the fan output voltage, i havent been able to read the output chassis and cpu cooler pins voltage cause i can find...


"i can find my dmm?" did you mean CAN'T?
"its clearly off", what is off?
the fans are 3 pins,2 are power, one is RPM tachometer.
"it all works fine", so you can boot and run any OS, ?

"the voltage reads +12vdc", where, at fan or PSU?
the fans run off 12vdc, they are DC motors (from outside fan)
if the fan runs slow at 12vdc the the fan is bad or is a low RPM
fan, as some are, bigger fans run slow, for less noise.!

first is the CPU fan it must run full speed, if not the CPU will overheat in seconds and ALL CPU shut them selves (by there selves) this way. so CPU fan is first. what does it do... there....?

then BIOS screens. GOT BIOS UP? and running? with, ESC key pressed>.
let me guess your symptoms
1: PC dead. will not boot.
2: BIOS dead.
3: all fans DEAD,.
4: power switch works and all PSU voltages read right, (seems not)/?
5: if the PSU power wire reads right(DMM), matching the side sticker voltages, and the CPU is dead, the MOBO is dead, or CPU is toasted.


here is a modern PSU, sticker.
see 5 to 10 power lines, see them. all must read correctly
if a fan is dead, then its dead if 12vdc is present on the fan power pins.




psu-dsqaqngzuibs2svxh2bga4t0-2-0.jpg

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My computer fan afb0712hhd. when i turn it on the fan runs fast for a few seconds, then runs slow and the cycle continues. can you tell what is wrong?


Your fan is following the heat pattern of the CPU. As your computer does more stuff, like runs more applications, it has to work harder to make everything go. This creates heat that needs to be cooled by the fan. The fan usually has 2 settings, low, and high. When the CPU reaches a certain temperature the fan will switch into high gear to help cool it down.

Mar 29, 2011 | Computers & Internet

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Compaq Persario SR2013WM starts booting,then quits fan on high


Seems like a motherboard or memory issue. Try removing the memory and re-seating it. If that doesn't work then try replacing the memory as it is the easiest and cheapest.

Mar 28, 2009 | Computers & Internet

2 Answers

Computer keeps shutting down.


Do the fan's spin when you power the PC on? All of the fans should spin up for at least a second upon initial boot. The CPU fan and video fan (if you have an external card) will spin the entire time the PC is on and vary in speed depending on temperature.

Try booting the PC with the side of the case off and note and fans that aren't spinning. The temperature to shut off the CPU is really high. If the temperature is getting hot enough to do this, you should notice a failure in a fan right away.

Mar 09, 2009 | Computers & Internet

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My DC5000 SFF turns on okay then switches off randomly Help!!


Which fan are you referring to? As far as I know the fan in the power supply runs at the same speed at all times. So if that is the fan you are hearing it may indicate that the power supply is failing. The power supply may be over heating and shutting down. I would try a different power supply if you can get your hands on one.

Jan 18, 2009 | Compaq DC5000 PC Desktop

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I have a 945GCT-M/1333 motherboard but my processor is a Intel Pentium 4 - 2.66mhz and it seems to run for a little while and then shut down the entire system. I am running a Ram chip 1GB speed 533MHz...


I always suspect overheating first in these cases. Are the fans, especially the fan on the cpu heatsink running?

You can check the system temperatures on most systems by booting the PC and entering the BIOS setup ....often by pressing the DEL, ESC or F2 key repeatedly as it starts up (the screen will tell you . which key to press to enter setup) . In the BIOS setup navigate to the "HArdware Monitor" or "PC Health" section. Watch the CPU temperature. On idle in the BIOS setup the temperature really shouldn;t go above 40C.

If it's a lot higher than this then the CPU heatsink fan needs attention.

Dec 31, 2008 | EliteGroup ECS 945GCT-M/1333 Motherboard -...

1 Answer

KINGSTON VALUE RAM 1GB PC3200 MEMORY


Hi,
You have the answer in your question. I have checked the PC specification and you are right, it uses PC2700 memory. Therefore you need to install PC2700 memory. PC3200 memory will be the wrong speed and will not be supported.

Daryl

Apr 18, 2008 | Computers & Internet

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COOLING FAN AND COMPUTER CUTTING OFF


When you say cut off are you meaning that the laptop is shutting down?

The fan is only running intermitently when on battery as the laptop is running in power saving mode 
and the speed drops when not needed as well as the cpu voltage
therefore reducing the heat produced and the nedd for the fan to run.

Try using a program called cpu-z and it will show the speed of the cpu going up and down as needed. Also use speedfan to sjow you the cpu tempreture.

Hope this helps and puts your mind to rest ? :)

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