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Loud Noise coming from the case

Discussion in 'Windows XP' started by cap2587, Nov 14, 2009.

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  1. cap2587

    cap2587 Thread Starter

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    I have a Dell Dimensions desktop that I am fixing for a friend. Once the computer has been on for a few minutes it starts to make a loud noise like the computer is an aeroplane taking off. It seems like it maybe coming from the power supply fan, but I am not sure. I might try and put another power supply in the machine to see if it still does it. Any other ideas as to what it could be. Thanks.
     
  2. etaf

    etaf Moderator

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    is it a fan or a siren coming from speaker - as that would indicate a over heating issue

    what happens to the PC, does it run while the noise is coming from the PC?
     
  3. cap2587

    cap2587 Thread Starter

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    Etaf,

    The PC seems to run okay despite the noise. It sounds like it is coming from the Power Supply Fan and is just a louder than usual sound. Should I put speed fan on the system and see what Temp it is running at? Appreciate your help. Craig
     
  4. etaf

    etaf Moderator

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    If the PC is running well, then your probably right - the fan is dry and now making a noise
     
  5. cap2587

    cap2587 Thread Starter

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    What do you mean by the fan is dry? The PC was probably sitting for years and years without being used. I may put another power supply in it to see if this would eliminate the problem. Thanks
     
  6. etaf

    etaf Moderator

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  7. Frank4d

    Frank4d Retired Trusted Advisor

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    If you aren't sure it is the power supply fan, try to stop or slow it down. You may need pencil or something small to press on the fan hub close to the center (don't put anything i the fan blades though). If the sound stops or changes then it's the PSU fan.

    If that isn't it try the CPU, GPU and case fans one at a time.
     
  8. cap2587

    cap2587 Thread Starter

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    Your saying you think it maybe the computer fan and not the Power Supply Fan. Can I remove the computer fan and try another one. Where would I buy a new computer fan from and are they standard through all computers. Thanks.
     
  9. cap2587

    cap2587 Thread Starter

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    Frank4d,

    Thanks for your input. I am not really sure on how you want me to slow down the fan. Is the fan hub the plate in the middle of the Fan on the back of PSU? I will give it a try.
     
  10. Frank4d

    Frank4d Retired Trusted Advisor

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    Yes, the spinning round part close to the middle, not the actual fan blades.
     
  11. cap2587

    cap2587 Thread Starter

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    I used the PC for 3 hrs last night and didn't hear the loud noise. I will keep you posted on the problem. Thanks
     
  12. cap2587

    cap2587 Thread Starter

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    I followed your advice and placed a pencil on the middle of the back of the PSU. This did alter the sound of the noise coming out of the PSU. It muffles the sound and told me clearly that the noise is coming from the PSU. I am looking for a cheap PSU for around $30 that would meet the requirements of my Dell Dimensions 8400. Any Ideas. Thanks. Craig
     
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