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Unknown Humming That Comes & Goes


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11 replies to this topic

#1 lemonade

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Posted 06 April 2012 - 03:55 PM

Can anyone direct me how to diagnose this? My Dell has recently starting humming at random times, but I haven't really discovered a pattern for what causes it. It may hum while idle or active, but it stops when I turn it off and then back on, then may not have a problem for days at a time. I assume it's the fan? It probably wouldn't bother me so much if it could at least carry a tune.

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#2 hamluis

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Posted 06 April 2012 - 04:01 PM

System model, laptop or desktop?

Louis

#3 lemonade

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Posted 06 April 2012 - 04:37 PM

Desktop. I know I'm ignorant, but how do I find model to tell you? Is it Dimension 4700?

Edited by lemonade, 06 April 2012 - 04:39 PM.


#4 computerxpds

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Posted 06 April 2012 - 05:14 PM

Hello,

What kind of a hum is it? Does it sound more like reving or a metalic hum? When was the last time you cleaned the dust out of the inside of the case?

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#5 lemonade

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Posted 06 April 2012 - 05:17 PM

The pitch isn't consistent really. It almost sounds like the fan is oscillating at an inconsistent speed. Do I just turn off the computer, remove the case's screws and take a can of air to it?

#6 computerxpds

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Posted 06 April 2012 - 05:19 PM

Yeah that sounds like a fan to me, To start of yes turn the machine of and unplug it. Then unscrew the screws and remove the cover, Be sure to touch the side of the case before touching anything inside, so as to prevent static discharge! :) Also the can of air will work perfect. :)
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#7 lemonade

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Posted 06 April 2012 - 05:20 PM

Okay, I'll try that now & let you know.

#8 computerxpds

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Posted 06 April 2012 - 05:22 PM

Ok :)
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#9 lemonade

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Posted 06 April 2012 - 05:49 PM

Easter Bunny anyone? Okay, how about dust bunnies? So far it is quiet, so I will see how it goes for the next few days to be sure, since it doesn't hum all the time, BUT I think you solved it for me. Would this possibly have significantly hastened my booting time? I have never had it boot so quickly.


Edit--

Strike that. The noise returned as I was posting this, but I've never had it come back so quickly. It started with an increase in pitch to the humming sound, like a motor or a fan starting.

Edited by lemonade, 06 April 2012 - 05:53 PM.


#10 computerxpds

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Posted 06 April 2012 - 07:32 PM

Could be a bearing or motor of a fan going bad. If you can pin point its origin that would help a lot.
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#11 lemonade

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Posted 06 April 2012 - 07:42 PM

It is the fan. I'll trade it with one from another Dell. Prior to this thread, I was just afraid to tinker inside the tower and cause damage.

#12 computerxpds

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Posted 07 April 2012 - 12:09 PM

Ok sounds good, let me know if that solves it. :)
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