Computer starts, shuts down, starts, etc.

Hey,

My computer had been functioning flawlessly. When powering up one day, it ran for 4 seconds, shut down, ran for 4 seconds, shut down, etc. The power supply is a Corsair HX520, Gigabyte GA-965P-S3, 2 GB Corsair DDR2 800, 1 Seagate 160 GB hard drive, Sapphire Radeon 2400, Coolermaster Centurion case. Where do I start troubleshooting? Thanks for any response or advice.
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More about computer starts shuts down starts
  1. Reset the Cmos.

    After that test the PSU.
  2. jrhiram said:
    Hey,

    My computer had been functioning flawlessly. When powering up one day, it ran for 4 seconds, shut down, ran for 4 seconds, shut down, etc. The power supply is a Corsair HX520, Gigabyte GA-965P-S3, 2 GB Corsair DDR2 800, 1 Seagate 160 GB hard drive, Sapphire Radeon 2400, Coolermaster Centurion case. Where do I start troubleshooting? Thanks for any response or advice.



    have you removed the cpu lately

    sounds like a cpu cooler issue..


    at this stage it could be anything
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