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CPU Fan starts and stops constantly. No Post

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Last response: in CPUs
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June 23, 2009 8:47:51 PM

This morning my PC stop working. All leds and peripherals seems to be running, but the CPU Fan starts and stops spinning every several seconds and it don't post.

Relevant Specs:

Asus M2N-SLI
AMD Athlon64 X2 6000+
PSU C3 Tech 500w
4GB DDR2 800MHz
ECS GeForce 9600GT Accelero

Tests done:

- Turn on only Mobo and CPU. Same result.
- Tested with a old generic PSU. Same result.
- Tested the CPU Fan on Chassis fan header. It spinned normally. It seems not to be the CPU fan issue.
- Tested Chassis fan on CPU fan header. It spinned normally. The chassis fan has only 3 pins the header has 4.
- Tried to reset CMOS. Same result. Someone recommended me to let the jumper 8 hours on clear position, I will do it tonight.
- Both PSU works in another PC.
- Tested Fan without CPU. Same result.
- Tested CPU without Fan. Same result. It heats.

Posibilities:

- PSU failing in my system.
- CPU died.
- Mobo can't manage CPU fan.

June 23, 2009 9:24:39 PM

Have you considered the possibility of the Video card or RAM being the issue?

If you have more than one stick of ram try with only one and then another
If you have another video card or an integrated one swap
June 24, 2009 12:18:11 PM

rojito said:
Have you considered the possibility of the Video card or RAM being the issue?

If you have more than one stick of ram try with only one and then another
If you have another video card or an integrated one swap



I tested it without any peripherals, Mobo and CPU only, with no result. I suppose if the problem was in video board or memory stick the CPU fan would spin without these itens.
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June 24, 2009 6:09:04 PM

sorry man... I'm out of ideas other than trying to put everything on another mobo.
It seems your mobo is faulty, but it's unusual for it to happen if it was ok after installing.
June 24, 2009 6:20:46 PM

if you're still having problems, try posting another thread, since this one seems to have been seen only by me
June 24, 2009 9:19:09 PM

Clear CMOS, if no change, is CPU or motherboard, (If heatsink firmly fitted). More likely to be motherboard.

Mike.
a c 145 à CPUs
June 24, 2009 9:38:59 PM

I agree, it's likely the motherboard.

It sounds like you've eliminated everything else.
a b à CPUs
June 24, 2009 9:51:59 PM

I have had several Asus boards do that, and it has always been the board for me.
June 25, 2009 12:42:00 PM

It's probably the Mobo. I bought a new PSU and the issue persists. I will try to trade it for a Mobo.
June 25, 2009 5:56:28 PM

The Mobo is the issue. I tested all others components on another Mobo and they worked.

I bought a ECS GF8200A Black Series. Did I do well?
June 25, 2009 6:13:39 PM

I should be the mobo almost for suer, so if that mobo meets your requirements, it was the only solution.
a b à CPUs
June 26, 2009 1:40:38 AM

I would have chosen a different brand than ecs, but it should work.
!