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fan on NB=unstable. no fan=stable?!?! - Page 2

post #11 of 24
weird, i have never heard of anything like this. I suppose you could RMA as a last resort...
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post #12 of 24
Have you tried other 3-pin connectors?

Perhaps there is a flaw in that particular circuit that causes instability when the fan draws from it?
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post #13 of 24
Yeah, just swap one temporarily and see. It can't hurt to bypass the motherboard all together.
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post #14 of 24
It is possible the fan is bad.. I had an antec fan cause serious BSODs over and over again.. until I took it out and it worked completely fine..
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post #15 of 24
Thread Starter 
Quote:
Originally Posted by Syrillian View Post
Have you tried other 3-pin connectors?

Perhaps there is a flaw in that particular circuit that causes instability when the fan draws from it?
Syrillian, I love it when you post in my threads. I am gonna try this as it actually makes sense

Powering off now to do some quick tests - test that particular plug, and the fan on a different plug. Check back in 5 to see results
    
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post #16 of 24
Thread Starter 
Resuults are mind boggling

The fan on that SPECIFIC CONNECTOR shorts out the system and I cant boot half the time, sometimes makes it to the Microsoft Green bar screen


I move the fan elsewhere - nothing funny happens, and I have a hi-power 5000rpm fan on the older connector


*** HAX?!??!!?!?

I swap back the fan, NO BOOT,

I remove the fan, BOOTs??!?!?

***? ghost?
    
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post #17 of 24
Ghost in the Machine.

How accessible is the backside of the mobo? Take a close look to see if a stray speck of dried AS5 or similar compound or gunk is messin' with yer Mobo's Mojo. Perhaps clean the backside with some Alcohol or a xylene-based cleaner?

Not all circuitry is exposed, but ya never know...

To eliminate the fan altogether try another fan on the header, maybe try without the rpm sensor lead connected... ? I'm totally guessin' now.

If it is that header, are ya gonna just "live with it"?
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post #18 of 24
Thread Starter 
Quote:
Originally Posted by Syrillian View Post
Ghost in the Machine.

How accessible is the backside of the mobo? Take a close look to see if a stray speck of dried AS5 or similar compound or gunk is messin' with yer Mobo's Mojo. Perhaps clean the backside with some Alcohol or a xylene-based cleaner?

Not all circuitry is exposed, but ya never know...

To eliminate the fan altogether try another fan on the header, maybe try without the rpm sensor lead connected... ? I'm totally guessin' now.

If it is that header, are ya gonna just "live with it"?
I actually wiped down the back side of my motherboard before installing it because I left it on my desktop while running it. I dont run wires back there so I am almost certain there is nothing back there that is pulling an Austin Power's cryo-state

I tried the fan on another connector that was on a fan controller (BTW I dont use motherboard fan headers, its all Molex or Fan controller powered, I might change that soon though seeing the placement of this fan is very annoying)

I tried a fan on the troubled connector, no problems - was able to get to windows and load up FAH.

I tried the troubled fan on a good connector, no problems.

Its just this fan, on this connector that was finicky....
    
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post #19 of 24
...wierd...

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post #20 of 24
Thread Starter 
wait a sec something weird just happened

I remounted the fan and now its causing problems again.


I am thinking the fan is shorting out something.... but I mounted the fan using one of the screws from a fan (Sanwiched it on the rear fan mount instead of mobo)

and I cant get past bios now..........


EDIT:

I think I found 1 of the probs. Seems when the fan is mounted to the case and touching the NB sink, causing a problem, I unpluged the fan and it still had issues being mounted on the NB
Edited by XFreeRollerX - 5/23/08 at 11:48pm
    
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