Computer Freezes after fan replacement

Albatron / K18d pro ii
February 2, 2010 at 07:09:41
Specs: Windows XP, AMD XP 2400+, G.Skill RAM 2x1gig matched
Wanted to breathe new life into an old Albatron ATX machine. Added ram (total of 2G) and it ran stable for a few weeks.

Also, I replaced a bad northbridge heatsink fan.

Also have replacement video card...but not installed.
After fan replacement. Machine booted into WinXP but immediately froze.

HDD read/write light stayed on constantly and task manager indicated 100% CPU usage right before crash.

Things were squirrelly...sometime it would make it to the desktop and run for a little while, sometimes it would halt at the splash screen, sometimes just a blank black screen.

I have a replacement ATI 4650 AGP video card but don't want to introduce that yet. The old card's fan is going out.

Decided to reinstall WinXP but computer will not get past first screen when atempting to boot off CD ROM. (it does pass the post with on normal beep) then freezes.

Machine will NOT boot off my "Write Zeros" boot disk while HDD is connected BUT WILL boot to the Write Zeros disk if HDD is disconnected. (I've used this disk before with no problems).NOTE: When trying to boot off CD, and HDD IS connected I hear a small tick sound, then drive light comes on and then off and there is a 2 second pause before it does it again over and over.

My take: (some info worth knowing....)

I grounded myself but forgot to switch off power supply button when replacing the fan. Perhaps I fried something...but why would it even boot with HDD disconnected? That indicates to me the board and CPU are working.

The replacment fan is a Sunon Maglev with a 3 wire connector. The old fan only had 2 wires.

Could someone shed some lite on the proble please?

I might try a different hard drive, disconnecting the fan's 3rd wire, and trying a new IDE cable.

Is there a way to "reset" the board? Remove battery? Would that accomplish anything?

Thanks for your time for this problem.

Albatron K18d Pro II
AMD 2400+ cpu
2x1G G. Skill pc3200 RAM
Primary HDD: Seagate ATA 133 120g
Slave: WD ATA 133 320g
video: ATI 9700

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February 2, 2010 at 07:47:51
"After fan replacement. Machine booted into WinXP but immediately froze"

If your system had been working OK & the only change made was the cooling fan, why would you attempt to reinstall the OS, swap cables, clear CMOS, etc? The obvious problem would be with the fan installation or something that you may have disturbed while replacing the fan.

Did you simply replace it or did you also remove the heatsink from the NB chip?

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February 2, 2010 at 09:23:29
OK a little more background. I had recently installed the OS and decided that when I got the new video card, since I wasn;t too far into the new install I'd just reinstall with the new card to save a potential headache of uninstalling video drivers and the like.

Yep, I agree with you, this is a hardware issue.

All I did was take off the old fan and replace with the new one. I did not remove or otherwise disturb the heasink onthe chipset.

Any suggestions?


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February 2, 2010 at 09:24:52
I was thinking that I might disconnect the fan and try a bootup to see if the fan itself has caused an issue...then try it with the third wire(I'm guessing tach wire) removed.

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Related Solutions

February 2, 2010 at 09:31:14
"i hear small tick sound" before upgrading, did u hear any sound from hdd?

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February 2, 2010 at 10:15:18
I wasn't able to exactly pinpoint the sound but it seemed to be coming from the HDD and was sync'ed to the light going on and off. I'd say that's where it's comign from. The drive made no such sound before this.

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February 2, 2010 at 10:47:28
U mention your write zero disc can't boot when the hdd is connected and boot if hdd is disconnected plus u hear some small tick sound which is bad for hdd to make tick sound, I suspect u have bad hdd. If u have linux live cd u can try it and see if the system freeze.

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February 2, 2010 at 11:39:44
Don't have the linux live CD...but will look for one. Also I have an old drive I'll try swapping to see if it will boot.

Thanks for the suggestions. I'll post my findings tonight or tomorrow.

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February 3, 2010 at 07:40:32
Success! I went back and unplugged the fan and presto! The machine booted up and ran stable. The original fan had only a hot and ground wire. The replacement had 3 wires.

I pulled the 3rd wire out and reconnected the fan....the machine booted up fine and ran stable for as long as it was on.

thankd for your help and sterring me back int the direction I had planeed to go.

Much obliged

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February 3, 2010 at 08:26:53
Yeah, iam glad u did it.

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