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06.18.2008 at 03:15PM PDT, ID: 23497123
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CPU Fan stops few seconds after starting PC - most components have been replaced

Asked by josanbabu in Computer Fans and Cooling, Computer CPU Processors, Power Supplies / UPS

Tags: fan, stops, cpu, starts, after

I've seen similar posts with this issue, but none of the suggestions have helped me resolve the problem.

History:

I had a home-built PC until one day when the CPU overheated and the whole system refused to boot. I checked the CPU and it looked fine, so I salvaged an old Motherboard from my brother's PC (he upgraded). The system wouldn't boot, but the CPU fan and one case fan would spin for a couple of seconds. So I replaced the CPU with an older P4 (went from potentially fried P4 2.4GHz to P4 2.0GHz). Same problem. Thought it might be the Power Supply, so I bought a new one (550W Thermaltake, 200W larger than orginal PSU). Same problem. Replaced CMOS battery. Still same problem. I've upplugged all components save the video card (ATi Radeon9700), and I still have the same problem: CPU fan spins (if pugged in) for a couple seconds and monitor goes from standby to awake to standby. The CPU heat sink is correctly installed/seated using Arctic Silver, and the room is cool. I have 3 DIMMS of 512MB RAM that I've swapped out and tried.

My next step is to try the boot without the video card, but I don't think it's the problem.

Any ideas?!?

-JBStart Free Trial
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[+][-]06.18.2008 at 05:16PM PDT, ID: 21818350

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[+][-]06.19.2008 at 01:38AM PDT, ID: 21820346

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[+][-]06.19.2008 at 10:00AM PDT, ID: 21824131

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[+][-]06.19.2008 at 11:41PM PDT, ID: 21828866

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[+][-]06.20.2008 at 07:43AM PDT, ID: 21831669

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[+][-]06.28.2008 at 05:31PM PDT, ID: 21892514

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[+][-]06.28.2008 at 07:03PM PDT, ID: 21892694

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[+][-]06.28.2008 at 07:09PM PDT, ID: 21892704

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About this solution

Zones: Computer Fans and Cooling, Computer CPU Processors, Power Supplies / UPS
Tags: fan, stops, cpu, starts, after
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Solution Provided By: PUNKY
Participating Experts: 5
Solution Grade: B
 
 
[+][-]06.28.2008 at 11:46PM PDT, ID: 21893166

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[+][-]06.30.2008 at 06:05AM PDT, ID: 21898727

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