MSI X48 Platinum CPUFAN dead

Micro-star international X48 platinum mo...
March 2, 2010 at 19:17:09
Specs: Windows 7
My home built PC has ran with no issues
whatsoever for around a year now.

Last night i looked inside the clear panel and
found my Zalman CPU cooler fan was not

I immediately shut down and checked
connections which were fine. The Zalman has
an external switch that goes from CPUFAN ->
switch -> fan. I tried hooking up the fan
directly to the CPUFAN jumper and no luck. I
recently built a friend a box and had an extra
fan so I hooked that up and booted it. This fan
did not come on either.

I'm out of ideas other than one single jumper
on the board went bad which seems very
strange to me--any help is appreciated.

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March 2, 2010 at 19:37:49
Did it always run 100% of the time before this? Or did you just happen to notice that it's not running & got yourself into a panic? Could it be that your board uses some sort of SMART fan setting that varies the fan speed (or disables it altogether) based on CPU temp?

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March 2, 2010 at 19:46:53
It ran 100% of the time and was nifty enough to have an led
light so I could easily see it was on.

Originally I was using the stock cooler which fed directly off
the mainboard via CPUFAN jumper. I replaced with the
Zalman cooler which fed power from the jumper but had a
switch to manually control the fan speed--it wasn't controlled
by the mainboard at all.

All of a sudden it just doesn't work. I've checked Bios
settings, which whether i turn the fan support on or off there is
no difference.

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March 3, 2010 at 12:59:20
I've had fan connectors on the motherboard quit. I've used a special adapter to connect the fan to a molex connector. The adapter cable would have a special wire for the speed sensor. Below is just an example:

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