CPU fan shorting out

[CDC Mail Guy]

A PC that I threw together for a friend is shutting down because the CPU fan stops. She found that if she "taps" it, it starts again. So I'm thinking there is maybe a short on the 3pin connector on the mobo. Can I replace that fan with a fan that has a regular 4 pin connection...directly into the power supply? Does anyone know where I can find a fan for an Intel CPU that I can do this with?

 

[bob4432]

maybe the fan is out of balance? bb stuck? not really sure what the setup is but some m/b will not start up without a signal on the cpu fan header, or there may be a bios setting for it for you to disable it and put on a fan w/ the 4pin molex connector.

 

[lenjack]

The fan is not shorted. The problem lies elsewhere.

 

[suicidalpigeon]

Originally posted by: lenjack
The fan is not shorted. The problem lies elsewhere.

enlighten us!

 

[Trizik]

What is she tapping exactly?

I just had a bad power supply that would shut down/reboot the computer every time I tapped it.

 

[CDC Mail Guy]

No...she taps the FAN to get it running again, not the PS. Of course, by the time the fan shuts down, the PC does as well. I do not think the fan has a short in it, there must be something wrong with the 3 pin plug on motherboard. What if I just got a 80mm case fan, and put it on the heatsink, then plugged it into the PS directly? NO...Intel too hot?

 

[SlitheryDee]

Originally posted by: CDC Mail Guy
No...she taps the FAN to get it running again, not the PS. Of course, by the time the fan shuts down, the PC does as well. I do not think the fan has a short in it, there must be something wrong with the 3 pin plug on motherboard. What if I just got a 80mm case fan, and put it on the heatsink, then plugged it into the PS directly? NO...Intel too hot?

I think you'd lose the ability to monitor and adjust fan speeds. Some mb won't post without a cpu fan rpm reading, which I think can only be obtained when you plug the fan into the cpu plug on the mb unless you can disable it in the bios as mentioned earlier.

 

[sniperruff]

the 80mm would actually work better assuming it's not a low rpm fan. i have a 60mm -> 80mm fan adapter for my stock athlon HS. much quieter too and works.

 

[LED]

Originally posted by: CDC Mail Guy
A PC that I threw together for a friend is shutting down because the CPU fan stops. She found that if she "taps" it, it starts again. So I'm thinking there is maybe a short on the 3pin connector on the mobo. Can I replace that fan with a fan that has a regular 4 pin connection...directly into the power supply? Does anyone know where I can find a fan for an Intel CPU that I can do this with?

YES and SVC

 

[CDC Mail Guy]

thanks. Just put in a case fan that had 2 plugs on it, 1 to mobo and the 4pin to the PS, and is working fine.