Hissing sound coming form dell tower #4400

Dell DimensionĀ® 4400 series,pentiumĀ® 4...
June 18, 2010 at 09:13:41
Specs: Windows XP, don't know
There is a strong hissing sound coming from my Dell 4400 tower. It started recently, I have had it for at least 7 years. My repair guy thought it isn't serious. He didn't think it was the fans. But its driving me crazy and I'm afraid it might be dangerous. Help! Im not a technogeek, so can't do all those esoteric ffixes I read abour on your discussion list.

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#1
June 18, 2010 at 09:26:18
THAT could be bad capacitors, especially it's that old:

"When a faulty capacitor is charged, the water-based electrolyte becomes unstable and breaks down, producing hydrogen gas. Since these types of capacitors are sealed in an aluminium casing, the pressure builds up within the capacitor until either the flat metal top of the capacitor begins to bend, or the rubber sealing plug is pushed down. Eventually the pressure exceeds the strength of the metal casing and venting occurs, either by blowing out the rubber bottom of the capacitor, or bursting the scored metal vent on the top of the capacitor. When an electrolytic capacitor bursts, effects can range from a pop and a hissing noise to a small explosion. Venting is typically messy, and the corrosive electrolyte must be cleaned off the motherboard to prevent further damage."

http://en.wikipedia.org/wiki/Bad_ca...

Just another stupid saying...


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#2
June 18, 2010 at 09:28:37
"hissing"

Is this right or is it more of a high pitch wine sound?

If it sounds like water hitting a frying pan then I would be worried that something is melting. Do you smell any thing burning? You may have to take the cover off to smell.

If it is a high pitch wine (may have to get a kid to hear it because most adults older than 25 can not hear high pitch sounds they kinda sound like a his to us) then it is most probably an inductor in your power supply that the coating has worn off of and it is now banging together making a high pitch sound. If you can identify the inductor, you can put nail polish on it to make the sound go away or just don't worry about it because it will cause no damage like your repair guy said.

http://forum.novatech.co.uk/showthr...


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#3
June 18, 2010 at 12:16:04
If it bites you it might be a snake.

You will need to run it with the case open to find out what it might be.

Dumb repair guy shouldn't guess. He should have looked at it.


If you are worried then take it to a repair place or just get a new one. They are pretty cheap now. Maybe $400 will get you a pretty good one.

I support the 'Everybody Draw Mohammed Day'. A religion doesn't deny my freedom.


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Related Solutions

#4
June 18, 2010 at 12:31:58
Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
http://members.datafast.net.au/~dft...

What to look for, mboard symptoms, example pictures:
http://www.badcaps.net/pages.php?vid=5
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
http://www.badcaps.net/

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:
http://www.halfdone.com/Personal/Jo...
.....

NOTE that you can also have bad capacitors on the board inside the power supply. You would need to remove the PS and open it up to determine that.

The only time I have heard bad capacitors leaking, it turned out to be they were inside a Sparkle brand power supply. You could hear the sound when the computer was not running, when the power supply was still hooked up to live AC power.
It sounded like a kettle does while warming up.

ATX power supplies are always powering some places on the ATX mboard, and the power supply is partially on, even when the computer / Windows is not running. If you hear the sound when the computer is not running but it's still hooked up to live AC power, then it's extremely likely your problem is bad capacitors.



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#5
June 18, 2010 at 12:41:48
"If you are worried then take it to a repair place or just get a new one. They are pretty cheap now. Maybe $400 will get you a pretty good one."

Spend $400 on a 7 year old computer are you nuts. Better off buying a new one.


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#6
June 18, 2010 at 13:10:43
Uh.... I am sure the $400 was an estimated cost of a new one.

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#7
June 18, 2010 at 14:26:33
Yeah; jefro wouldn't recommend spending 400 bucks to fix a 7 year old pc.

Skip


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#8
June 18, 2010 at 15:11:58
Oh ok, I thought he meant to spend 400 to get it fixed not to turn it in and buy a new one.

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#9
June 18, 2010 at 18:07:17
DO you ppl smoke dope? GIMME some!

Just another stupid saying...


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#10
June 19, 2010 at 09:43:15
Get a new one.

A new computer is pretty cheap.

A new good new computer may only cost $400.

The part about a snake was supposed to be a joke.

I support the 'Everybody Draw Mohammed Day'. A religion doesn't deny my freedom.


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#11
June 19, 2010 at 09:49:28
Not everyone has $400 to spend though, especially in this economy.

Just another stupid saying...


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#12
June 19, 2010 at 10:23:52
Dell 4400's are listed on the local craigslist for $120-200.

I would give less than 100 bucks just for a tower. The $200 price is for a complete system.

Skip


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#13
June 19, 2010 at 12:22:33
The OP is welcome to fix or replace. I wouldn't spend more than $30 on a 7 year old computer to fix it. Sure a new PS maybe but that would be my limit.

I'd guess an atom based would be faster.

How about under $200?

http://www.tigerdirect.com/applicat...

I support the 'Everybody Draw Mohammed Day'. A religion doesn't deny my freedom.


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