Question about Dell Dimension 2350 PC Desktop

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Dell dimension 2350 pc turns off and on repeatedly

I have a dell dimension 2350, pc. It is approx. 8 years old and up until two weeks ago, always ran fine. Recently at start up after being shut down longer then an hour, the fan that blows into the pc started sounding like maybe barrings were going bad, like a baseball card in spokes, kind of sound...after running for about ten minutes, the sound would stop. And then two weeks ago, in the middle of surfing the internet, the computer just completely shut down. When I tried to start it again, it would boot up to the desktop, and the shut down again. I let it sit for about an hour, and tried again, and this time it wouldn't even turn on. It just kept turning on and off, repeatedly, never reaching the desktop screen.
I have put in a brand new power supply, exchanged hard drives, and changed the bracket for the heatsink.....
Nothing worked....
Any suggestions on what this problem might be, and HOW DO I FIX IT???
Thanks

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  • 4 more comments 
  • swindell_mom Feb 21, 2009

    why get rid of it if it still work(ED) fine...it JUST now gave me my first problem!



    I have not changed out the fan as of yet because it still works, it just makes a funny, loud sound when I turn the comp on. Than fan is the next thing on the list to replace, but for some reason I don't think that will fix this problem.

  • swindell_mom Feb 21, 2009

    does "mobo"= mother board?

  • swindell_mom Feb 21, 2009

    Yes, this PC does have a green plastic cover to the fan

  • cassandrashe Apr 04, 2009

    I cleaned out all the dust, but it still won't turn on. I turn on the computer, and it goes to the Windows XP screen. Just before log in, it shuts off automatically, almost lke time work.

  • cassandrashe Apr 04, 2009

    I turn on the computer, seems to run fine, then right before log in screen, shut down automatically.... fans are running fine.

  • Ben Wabnick
    Ben Wabnick May 11, 2010

    I remember in that computer that the fan that cools down the heatsink is actually in a big green plastic, have you been able to change out the fan?

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  • Master
  • 2,653 Answers

Sounds like a bad mobo. 8 years! Damn let it die already LOL..!!!

Posted on Feb 21, 2009

  • RescueTechLA
    RescueTechLA Feb 23, 2009

    Yes, mobo is short for motherboard. Kind of like modem is short for modulate and demodulate.




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