Replacing CPU fan

Thread Starter

Crocboy11

Joined Oct 9, 2013
2
I removed the original (non working) fan from my computer which was a Datech 0925-12HBTA-2 and replaced it with an aftermarket fan purchased from Fry's.

It fit perfect and has same 3 pin connection. Put it in, plugged it in and NOTHING!!

Any ideas?????
 

MaxHeadRoom

Joined Jul 18, 2013
28,617
Put 12v on the Red & Blk of the original Fan and see if it runs OK.
If it does, it points to the Header circuit, as already mentioned.
Measure if 12vdc on the header.
Max.
 

studiot

Joined Nov 9, 2007
4,998
You can test the fans with a 12 volt supply.

Also test the drive pins on the motherboard, but using a meter. Do not run this for more than 30 seconds without the fan.
 

MaxHeadRoom

Joined Jul 18, 2013
28,617
If it is the 12v supply missing you would have to trace the source back, there should only be simple foil trace back to the 12v, the tach sense circuit would be into an IC of some kind, but it sounds like the 12v source is missing..
Max.
 

studiot

Joined Nov 9, 2007
4,998
Have you tested the old fan yet?

The supply at the header may be controlled by a temp sensor at the cpu. If this has failed then there will be no supply.
 
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