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My pc shuts down by itself

The computer turns off without any warning and when i switch it on, it doesn't turn on but the fan on the processor still runs. And sometimes it does turn on but it goes off when the O.S is about to load. Hi I'm having a very similar problem with a gigabyte GA-E45C-DS3R. My PSU is a Corsair HX520W.My CPU is an Intel Pentium Dual Core E5200 and I have two gigs of Crucial DDR2 533MHz SDRAM.

Should my PSU be able to support the Motherboard?

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  • Chopo87 Apr 24, 2009









    Hang on, Sorry I seam
    to have made a mess of my first post. I meant to post in response to
    another forum thread not start a new one.

    Anyway here are the
    symptoms. When I press the power button, the fans turn on, the CPU
    lode lights light up up the board. Normally, at this point, something
    cut's the power (I think Motherboard). Then the PC reboots.
    Sometimes, The PC gets as far as giving beep error messages. They
    differ, but once The error code was for the GPU and the other two was
    a general motherboard error. Other times the the pc can stay on for
    up to a minute before the power drops without giving any beeps, but
    still no post screens In these cases, If I plug in a DVD drive it's
    activity light seems to engage and if I plug in a hard drive, I think
    I can hear it spin (but case does not flash activity light). I've
    tested with VGA and DVI monitors.

    I've tested with just one
    and the other ram cards. But remember, The PC is not even posting. If
    it was the ram I should get a memory error POST, I think. I've tested
    the ram and GPU (Radion X800 SE) on another pc anyway.

    Can I
    measure the CPU temps If I can't access the BIOS?





    I'm almost certain It's
    a faulty Motherboard.





    When I have some time I
    will try the CPU on another pc and remove the board from the case to
    see if something is causing a short. Also, although the board
    doesn't officially support socket 775 pentium 4 CPUs, I tried
    swapping one in, In this case, the board would simply boot then drop
    power in about 1-3 seconds and go no further.





    Anything else I should
    try, or do I by this point have enough evidence pointing at the board
    to call up Gigabyte and request a new one?




  • Michael Slabbert
    Michael Slabbert May 11, 2010

    That PSU is fine for your setup. try taking out 1 ram and then boat. it is still does the same, try the same with the other ram. if it still continues, repost

  • Wim Sharpley
    Wim Sharpley May 11, 2010

    Have you checked youre C.P.U temp?

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I think you solved your own problem my friend... :)

but remember... if you put a cpu in that is not supported by the motherboard, you will break it.

Posted on Apr 24, 2009

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You need to replace the RAM ...

Posted on Apr 24, 2009

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