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Possible Power Subbly / Mobo Failure

I recently purchased a Corsair 850W ATX power supply. Installed it with my Asus M4A89TD PRO/USB3 Mobo. Installed everything and turned on power. Worked for about 20 minutes before suddenly shutting down. Tried to reboot and fans, cpu light powered on for 1/2 second and then turned off though mobo power pilot light stayed on.

Removed all connections and tried the paperclip trick. Same happened to PSU, turned on for 1/2 second then OFF.

Reconnected everything and I let it sit for about an hour at which time everything came back on and worked for about 2 minutes before shutting down.

Any thoughts? Im assuming this is a PSU failure but im hoping it wasnt caused by me. Im pretty confident in all plug connections to my mobo/VGA/drives. Could also be a mobo issue? Could htis have anything to do with my SATA drives?

Also, while building I came to a question: My VGA card has 2 power connectors each with 6 pins. My power supply had two cables with 6 pins with an expandable 2 pins. I assumed i was to plug in just the 6 pin plugs and leave the 2 pin expandable plugs disconnected.

Any help will be greatly appreciated.

Eric
4 answers Last reply Best Answer
More about possible power subbly mobo failure
  1. You did the paper clip trick and it turned on and then off? Did you have any load on it like a case fan? If you did and it turned off like that then its a PSU issue and its time for an RMA.
  2. hunter315 said:
    You did the paper clip trick and it turned on and then off? Did you have any load on it like a case fan? If you did and it turned off like that then its a PSU issue and its time for an RMA.


    The paper clip caused it to turn on just long enough to cause its fan to rotate about 180 degrees. There was no load on the PSU at this time.

    Strange how letting it rest for an hour or so allows it to reset. Must be a temperature issue?
  3. Best answer
    Use a case fan with it to give it a little load as shown in this video
    http://www.youtube.com/watch?v=5FWXgQSokF4

    If it still does the same thing its safe to declare the PSU dead.
  4. Best answer selected by orkiei6.
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