Question about Dell Dimension 4700C PC Desktop

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Overheating my dimension 4700c overheats and shuts down. It also runs pretty load. my solution is to put a large fan up near the back of the computer, put this is not an ideal ix..

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  • Dell Master
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The cpu fan would need to be replaced and therman greeze added in between.

also the airflow in the case should be maxed out by puting all the cabels togeter with something like this

http://www.juhaste.fi/kuvat/nippu.jpg

Posted on Apr 20, 2008

  • Ekse Apr 20, 2008

    I mean the fan heatsink (includes the fan)

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Overheating When the CPU overheats then it will shut down (i.e. thermal overload) and won't boot up again until it has cooled down. If this is the problem is not fixed then the CPU will eventually fail.
A faulty fan causes the problem or the fan and heat sink assembly are clogged with dust.
Check the CPU fan to see if it spins freely, if not replace the fan.
If the fan and heat sink is clogged with dust the remove the dust and make sure the vents are clear and dust free. Use a small brush and can of compressed air to do this.

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When I plug the unit into power, the CPU fan runs very fast but no boot, and then when I press power on the fan slows down and the PC boots normally. It shuts down in about 30 minutes with no sign of...


Sounds like you are overheating. One way to tell if it's overheating is you say it will run for about 30 minutes then shuts down. When it shuts down try rebooting to see if the boots successfully. If it fails to boot successfully right after it shut down then you are probably overheating. If you wait awhile to let it cool down for 30 minutes or so and if you reboot and it does it successfully you definitely have a overheating problem. If I remember correctly all those compaq sr series have loud and fast running fans. Computers overheat because of three reasons for the most part: 1) A fan has stopped working. 2) The Thermal Paste on the CPU and Heat Sink has dried up or is not thick enough to keep the unit cool. 3) Dust has clogged the fan vents and inside the computer. Fortunately for you desktops don't have to be completely disassembled like laptops to get to the fan, CPU and heatsink. Just pop the case and you'll see the components attached to the motherboard

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My Toshiba Tecra A9 overheats and shuts down


Check to see if the cooling fan is working properly. You should hear it running if you put your ears close when the computer is on. If the fan is working and the cause of overheating is not the fan, then you may have a deffective battery, check to see that the battery can take up charge. If the battery is fine, then you may have a chip inside the computer that is overheating because of internal defect. This job would be best left for experts.

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Dell Dimension 8400 locks up after 15 - 20 minutes of use it doesn't matter the applications that are running. The start button must be pressed and held for a few seconds to power down the unit. It will...


Sounds like an overheating problem to me. Try taking off the side of the case, and starting the unit. Pay close attention to the fans that you can see. leave the computer running, and continue to check the fans. If a fan is going bad, not working, or going to slow, then the processor will overheat, and shut off the computer. Bad fans are easy to replace, just make sure you get the right size, with the right plug. This is just one possible reason for your problem, a further troubleshooting of the unit is needed...possible bad RAM, or video card failure can cause this mysterious shut down.

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I assume you have a desktop computer. It is either the CPU is overheating or the 'Power Supply" is overheating/failing. Put your hand at the top back of your computer where the power supply is to feel if the fan is blowing air out the back. If there is no air coming out the back, then I think the fan has failed and the power supply overheats and fails. Repair or replace the fan before the power supply totally fails and has to be replaced.

Also check the fan and heat sink on the CPU. If they are loaded down with dust, the CPU is not getting cool enough, With power OFF, remove the fan and heat sink, clen them and put them back. That will do wonders to cool the CPU.

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It is obvious that your computer shutdown because it is overheating. try to get a chill mat to place it under computer. you said that it does not shut down when is on battery??? do you play games when is on battery?....computers normally overheat during large processing tasks such us playing video games. Try to fans clear do not place your laptop ontop of your bed or anything that will obstruct the fan under computer.

See if that works

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1 Answer

Dell 4700c


take off the side panel of the computer and listen to it a little closer when its on. there are very few actual moving parts so i should be fairly easy to isolate the noise. if it's a fan anywhere in the computer it can be replaced for less than 20 dollars and shouldn't be left till it dies, replace it , it's protecting something.

If it's a cd drive making the noise , it can be replaced for 25 dollars.

If it's the hard drive, then you need to back up your important files AS SOON AS POSSIBLE, because when it crashes, you generally have a hard time retrieving stored information from it.
hard drives can be replaced for 50 to 150 dollars depending on type and how large it is.
Most times the noise from a computer comes from the fans and power supply, then the cd/dvd roms , then the hard drive : so check them in that order. post here again if you need further assistance.. Regards

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2 Answers

Computer has shut down and can not re-start


The Dell 8300 does not use industry standard parts. You need Dell specific parts in order to replace the fan. Here is a link to a replacement fan shroud assembly for your Dimension: http://www.discountelectronics.com/index.php?l=product_detail&p=845
You may be able to find cheaper if you do a Goggle search and dig deeper. Hope this helps & please take a moment to rate this solution. Thanks.

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sound like it is overheating. my suggestion would be to use a laptop cooling mat(found at bestbuy radioshak or circuit city)

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We have a Dell Dimension 4700C too. We had it on a 3-year warranty and the only problem with it was that from that to time it would become abnormally noisy, too noisy in fact. Dell sent a repair guy twice, and they changed the heatsink/fan assembly unit both times, and the third time we did it ourselves (it's not that hard to do), but here's the thing, we noticed how DUSTY it was when it came out, we wondered how it even worked with all that dust. So, now our warranty has expired, and guess what, the computer started making that terrible racket again, so this time, we opened it, armed with the vacuum cleaner and a can of compressed air, gave the whole inside of the computer a good once over, removed the heatsink/fan assembly and cleaned it thorougly (you can't do this unless it is out), and it worked like a charm, can't even tell the computer is running. Hope this helps.

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