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Help with Cooling Fan (Question)
Two fans in my computer (Dell Dimension 2300) are making noise. One is in
the power supply and the other is the processor fan. I know I can replace the processor fan (with a green schroud) if I can find one. But can I replace just the fan that resides in the power supply. Dell says no, but it looks like a might be able to if I can find the correct size and power. I figured 10 bucks for a fan, not 50 or 60 bucks for a power supply. Thanks in advance, Shawn |
#2
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Help with Cooling Fan (Question)
Shawn wrote:
Two fans in my computer (Dell Dimension 2300) are making noise. One is in the power supply and the other is the processor fan. I know I can replace the processor fan (with a green schroud) if I can find one. But can I replace just the fan that resides in the power supply. Dell says no, but it looks like a might be able to if I can find the correct size and power. I figured 10 bucks for a fan, not 50 or 60 bucks for a power supply. Thanks in advance, Shawn Yes, power supply fans can be replaced but there is an important caveat: a power supply can kill you (or at least zap you badly enough that you will not forget it unless the jolt whacks your head against the wall hard enough to induce amnesia). With care it could be done by almost anyone who can remove the screws and splice some wires. Suitable care includes disconnecting the power, removing the supply completely, allowing it to sit for long enough to discharge the filter capacitors, touching no other conductors except the fan leads, insulating the leads properly after splicing them, and putting everything in the supply back together exactly as it was including shielding, insulation, and wire routing. If the PS uses a thermally controlled fan (I don't know if Dell spends the extra $0.05 for that feature or not) some care must be taken to make sure that the replacement fan has a similar power draw to the original to avoid damaging the fan control circuitry. -- John McGaw [Knoxville, TN, USA] http://johnmcgaw.com |
#3
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Help with Cooling Fan (Question)
On Thu, 12 Jan 2006 10:28:54 -0500, John McGaw
wrote: If the PS uses a thermally controlled fan (I don't know if Dell spends the extra $0.05 for that feature or not) some care must be taken to make sure that the replacement fan has a similar power draw to the original to avoid damaging the fan control circuitry. Chances are that the entire PSU needs replacement if the fan is acting up. In fact, it might be time for a new computer. -- Violence Against Women and Department of Justice Reauthorization Act: "Whoever...utilizes any device or software that can be used to originate telecommunications or other types of communications that are transmitted, in whole or in part, by the Internet... without disclosing his identity and with intent to annoy, abuse, threaten, or harass any person...who receives the communications...shall be fined under title 18 or imprisoned not more than two years, or both." |
#4
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Help with Cooling Fan (Question)
Bob wrote:
John McGaw wrote: If the PS uses a thermally controlled fan (I don't know if Dell spends the extra $0.05 for that feature or not) some care must be taken to make sure that the replacement fan has a similar power draw to the original to avoid damaging the fan control circuitry. Chances are that the entire PSU needs replacement if the fan is acting up. In fact, it might be time for a new computer. This is a ridiculous attitude. First, replacing a Dell PSU may cause unnecessary anguish, because Dell uses non-standard shapes and pinouts. Second, replacing a computer makes no sense if it is doing the job. Keeping up with the Jones boys just adds to the expense and waste generation. So, barring unusual circumstances, the OP should simply replace the fan while taking the appropriate precautions. -- Some informative links: news:news.announce.newusers http://www.geocities.com/nnqweb/ http://www.catb.org/~esr/faqs/smart-questions.html http://www.caliburn.nl/topposting.html http://www.netmeister.org/news/learn2quote.html |
#5
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Help with Cooling Fan (Question)
On Thu, 12 Jan 2006 09:00:01 -0500, "Shawn"
wrote: Two fans in my computer (Dell Dimension 2300) are making noise. One is in the power supply and the other is the processor fan. I know I can replace the processor fan (with a green schroud) if I can find one. But can I replace just the fan that resides in the power supply. Dell says no, but it looks like a might be able to if I can find the correct size and power. I figured 10 bucks for a fan, not 50 or 60 bucks for a power supply. Yes, both can be replaced. It seems curious that both are now making noise, I wonder if fine dust is accumulating elsewhere as well. On a similar Dimension I've serviced, I took out the rear exahaust (what you're calling the processor fan), peeled back the label, took out the plug, and put in some heavy oil (almost grease) and that did very well to quiet the fan. You might try it- at worst it is only a temporary fix for a few months but generally if you use the right lube and the fan hasn't degraded horribly yet, you may get a lot longer life. Similar with the power supply fan if it has a sleeve bearing rather than ball bearing (check label, it may list "ball" if it has one or two ball bearings, or after peeling back label it should be obvious if a sleeve bearing because you'll see a bronze colored sleeve around the shaft rather than a stainless steel colored bearing. Trying to lube a ball-bearing is often only an emergency fix as it may seize suddenly or become very noisey, but the sleeve bearing type will also repond well to lubing. Either can be replaced instead of course, just note the fan dimensions, voltage (almost certainly 12V but it's good to be sure of it), and current rating- since it probably won't have an RPM rating on it. You might choose a "slight" bit lower current rating but not much, both of the fans in your system should be thermally controlled and if you chose too low a current it could mean either insufficient airflow or complete failure to spin at all. If you don't have a spare system you can use during downtime, you might need to do a quick exploratory operation on the power supply to see what the fan rating is and how it's connected for power- whether a plastic plug-in connector or soldered onto the circuit board. The difference suggest the obvious solution, to seek a fan with similar connector if it has connector or have soldering iron and heat-shrink tubing handy (or electrical tape plus a nylon wire tie to secure the tape to be certain it never unwraps when the PSU heats up and adhesive does too). While you definitely need to unplug the power supply and wait a couple minutes, after that period of time there is no inherant danger inside, the caps have then drained and you could rub your hands all over everything with no danger- just don't plug it in till you have double-checked everything, made sure the fan leads are secured away from the fan blades and fixed in place. In other words, try to minimize slack in the fan wiring and if possible secure it so it doesn't fly around- a common method is to use a nylon wire-tie to attach to a fixed part of the assembly- fan corner hole or an indentation on the casing, or tied around another wire- how the original wire was secured is presumably a good method to use. Providing the power supply fan had continued spinning at reasonable RPM, it is likely you can just replace it. If the fan had been severely effected and the RPM was extremely low, such that there was insufficient airflow to keep PSU cool, then the PSU may now be heat-stressed and would be best replaced. A Panaflo fan would be a good choice for the rear exhaust, perhaps an "M" speed, maybe "H" (compare each current rating to the original fan). I would choose a dual-ball bearing fan in a quality brand for the PSU exhaust. Perhaps NMB. You can find their model #s on their website to facilitate easier web searches. |
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Help with Cooling Fan (Question)
On Thu, 12 Jan 2006 14:01:27 -0500, "Chuck F. "
wrote: Chances are that the entire PSU needs replacement if the fan is acting up. In fact, it might be time for a new computer. This is a ridiculous attitude. First, replacing a Dell PSU may cause unnecessary anguish, because Dell uses non-standard shapes and pinouts. Are you saying that Dell doesn't supply replacement PSUs for their computers? Second, replacing a computer makes no sense if it is doing the job. There is a point where putting more money into something that is old is not economical. Keeping up with the Jones boys just adds to the expense and waste generation. Operating systems and applications become more bloated each cycle. You may not want to keep up with Jones but you do have to keep up with Micrisoft. So, barring unusual circumstances, the OP should simply replace the fan while taking the appropriate precautions. You apparently are unaware that electrolytic capacitors age. -- Violence Against Women and Department of Justice Reauthorization Act: "Whoever...utilizes any device or software that can be used to originate telecommunications or other types of communications that are transmitted, in whole or in part, by the Internet... without disclosing his identity and with intent to annoy, abuse, threaten, or harass any person...who receives the communications...shall be fined under title 18 or imprisoned not more than two years, or both." |
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Help with Cooling Fan (Question)
On Thu, 12 Jan 2006 19:52:12 GMT, kony wrote:
put in some heavy oil Ever notice that PSU fans make noise in the colder months. -- Violence Against Women and Department of Justice Reauthorization Act: "Whoever...utilizes any device or software that can be used to originate telecommunications or other types of communications that are transmitted, in whole or in part, by the Internet... without disclosing his identity and with intent to annoy, abuse, threaten, or harass any person...who receives the communications...shall be fined under title 18 or imprisoned not more than two years, or both." |
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Help with Cooling Fan (Question)
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#9
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Help with Cooling Fan (Question)
On Fri, 13 Jan 2006 07:24:54 GMT, kony wrote:
Ever notice that PSU fans make noise in the colder months. I try to keep mine inside or at least give them ear muffs. I keep mine inside too, but I set the furnace at 65F so it gets a lot cooler in winter than in summer. I once had a tower near a slider window and when the window was cracked open, the PSU would make a racket you could hear all over the house. As it warmed up it quieted down. -- Violence Against Women and Department of Justice Reauthorization Act: "Whoever...utilizes any device or software that can be used to originate telecommunications or other types of communications that are transmitted, in whole or in part, by the Internet... without disclosing his identity and with intent to annoy, abuse, threaten, or harass any person...who receives the communications...shall be fined under title 18 or imprisoned not more than two years, or both." |
#10
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Help with Cooling Fan (Question)
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