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Fan Noise Dell Dimension 8400


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#1 HerrBuuB

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Posted 06 November 2010 - 08:10 PM

Hello,
I have a very noisy fan on my Dell. i tried blowing it out, but that didn't work.
The Machine is running great even though its a few years old, any help?
Thanks

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#2 ThunderZ

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Posted 06 November 2010 - 10:30 PM

Which fan?

#3 HerrBuuB

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Posted 07 November 2010 - 07:02 AM

Thank for the super fast response. To my knowledge there is only one. It is the fan in the CPU.

#4 killerx525

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Posted 07 November 2010 - 07:08 AM

You use a can of compressed air which is a lot more effective then blowing :)

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#5 ThunderZ

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Posted 07 November 2010 - 07:38 AM

Could you give the exact type and model number of your Dell.

While all but the oldest of machines have at least a CPU fan. Many\all now a not only the CPU fan but at least one in the power supply.

Some machines may have more.

#6 HerrBuuB

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Posted 07 November 2010 - 10:17 AM

Thanks, It is a Dell Dimension Desktop 8400.
And yes, I did use compressed air :)

#7 HerrBuuB

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Posted 07 November 2010 - 10:20 AM

Wow, OK it rebooted, but when I tried to start up it wouldn't boot up and was making aloud beeping noise.
Obviously i am back up now.

#8 ThunderZ

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Posted 07 November 2010 - 12:02 PM

Sounds like something may have come loose while you were inside the case.

Was there a pattern to the beeps. Were they constant? Were they grouped? Some being longer in duration then others?

Regarding the fan(s). That model should also has a fan in the power supply. If it can not be seen by looking at the back of the unit. Then it will be by looking inside the case at the power supply.

#9 HerrBuuB

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Posted 08 November 2010 - 09:25 PM

The beeps were steady and constant. Now it is totolly silent and everything is fine. Should I worry? I think it was the power supply fan (the topmost one)

#10 ThunderZ

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Posted 08 November 2010 - 09:41 PM

The beeps were a warning of sorts. Letting you know there was a pre Windows start-up problem. What ever the cause, if you did nothing yourself to eliminate them, the cause may remain a mystery. I`m thinking perhaps there was a bit of condensation from the usage of the compressed air. It has since evaporated.

If the PC is starting and running fine then I would continue to be a bit more vigilant regarding the PCs behavior. But I would continue to use it.

Power supply fans are replaceable. Depending on your comfort level working with electrical components and age of the PC in question will help you decide to either replace the fan or the entire power supply.

#11 HerrBuuB

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Posted 09 November 2010 - 02:07 PM

She is running great for her age. would it be wise to replace the fan now? Or "if it ain't broke don't fix it?"
Is it possible the air can worked and just took the evaporation to make the fix apparent?

#12 saradalton

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Posted 10 November 2010 - 02:38 AM

I would suggest you to replace the video card and see if it makes a little difference or you can resolve it by removing the plastic covering over the heatsink and cleaning out the dust.

Wish you luck :)

#13 HerrBuuB

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Posted 10 November 2010 - 06:54 AM

OK now back to the noise. It has started up again and is the power supply fan.

#14 dc3

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Posted 10 November 2010 - 10:52 PM

Trying to replace the PSU fan involves opening and working inside the PSU case. This is potentially very dangerous. There are capacitors inside that will hold high voltage charges for long periods of time. If you discharge these capacitors to your body it can have lethal effects.

If the fan is making noise the fan is probably failing, I would suggest replacing it. Dell at one time was using non-ATX form factor PSUs, but it looks like the 8400 uses a standard ATX PSU.

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#15 saradalton

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Posted 11 November 2010 - 02:20 AM

OK now back to the noise. It has started up again and is the power supply fan.



i agree with @dc3 that you should replace the fan if the problem still persists. Remember, machines and technology are never perfect so replacing the fan might help. :)




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