Question about Dell OptiPlex 780 PC Desktop

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Rattling loud fan dell optipilex 780

Fan not running when purchased 2nd hand have a press F1 key to boot because fan not running after starting finally got it going somehow after running a Dell diagnostic tool on a re-boot the fan came on with a rattling sound. sound

Posted by Anonymous on

1 Answer

  • Official Brand Answer
  • 560 Answers

Anonymous,
You may want to replace the fan. You can call the Dell Spare Parts Department at 1-877-717-3355 to purchase a fan.
Thank You,
Dell-Jesse L
Dell Social Media and Communities

Posted on Jun 04, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

squipps
  • 204 Answers

SOURCE: CPU cooling fan

Hi...you can press the F2 key to enter setup...and scroll down until the fan is highlited...hit enter and then F10 to save and exit.This tells the computer its OK.
you should have plugged the fan in the same pin port the old fan was in. Usually only 1,.
If the new fan is not from dell..it may be faster and noiser..or it may be faulty..if you bought it locally you may try to return it.
The purpose of the fan of course is to remove the hot air from the CPU to keep it from overheating. If this fan does it it is most likely ok.
Hope this helps..
Squipps

Posted on Feb 07, 2008

antiochpc
  • 1314 Answers

SOURCE: Hello

Yes, you need to replace that fan and not run your computer without it working because it can cause it to overheat and then you'll have to replace a lot more than just a fan. Open up the side of your computer and see which fan is not moving when the computer is turned on but it will be the one attached to the card cage :c)

Posted on Jun 05, 2009

  • 8 Answers

SOURCE: dell optiplex gx280 makes loud fan sound at

You may have a problem with your power supply(the loud fan noise) and eventually it may get too hot and will cause problems like not fully booting.

Posted on Jun 12, 2009

  • 212 Answers

SOURCE: Dell Dimension 8400 Start up Fan Noise

Might be a hard drive issue. I had the same problem with one of My desktops. I replaced the hard drive and it worked fine.

Posted on Jul 01, 2009

  • 1 Answer

SOURCE: Dell Demension runs great but loud fan noise that

I had a similar problem with excessive fan noise on my Dell Dimension 5150. The solution was to replace the worn heat sync compound that was between the cpu and the heat sync itself. (£0.99 ebay)

Posted on Aug 16, 2009

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How do I access the BIOS settings for the P5LP-LE motherboard. The startup key says to press F1, but pressing F1 does nothing.


The instructions say:
"Hold down the F1 key during the startup process and enter BIOS setup to re-enter/reset any custom BIOS settings." I would also try hitting the F1 key multiple times from the very turn on of the computer because the key may have to register at some point after turning on.

Try clearing the CMOS settings as explained on this page, it should clear out any passwords and will set the BIOS settings back to factory settings.

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As for "The CPU fan runs normally on boot, but as soon as the Windows flash screen comes up, the CPU fan slows way down."
This is quite normal. On start-up the temperature of the CPU is not being read, when the flash screen comes up just happens to be the same time that the computer recognizes that the CPU is cold and doesn't need to be cooled.

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This could be normal as when files are read from a DVD the CPU doesn't work hard, but when it unpacks the files or does calculations it does work hard. Or it could be that the thermal paste between the CPU and the heat sink is not correct. Either dry , not making contact, or even too much. If the heat is not being transferred that would also explain the shut-down.

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1 Answer

Making rattling sound Dell OptiPlex 780


It could be a fan making the noise. Either a fan is going bad, possibly a bearing or bushing. It could just be a wire that got too close to a fan and the blade hits the wire.

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This is just an easy problem... what you'll have to do is follow this steps

Step 1: If you have manual of your computer it is better.. restart your notebook, press and hold the key to boot in BIOS setup... try pressing this key F1, F2, Delete or F8, because some laptop and notebooks have different method of going to BIOS.. you will know if it is BIOS Configuration because it has a BIOS Settings at the Title of the screen.. now go to Power Management or Power Monitoring.. you can find the Fan option there.. because you change the fan of your notebook, it detects that the Fan that you installed is not standard with the note book.. go to step 2.

Step 2: Now when you find the fan option try to set to ignore the fan RPM and The Voltage that is uses... if there is... then save your settings by pressing F10 key and wait for the notebook to start normally.. if the notebook won't start normally, then go to step 3.

Step 3: In this step you'll have to Start in Safe Mode.Restart your notebook, while booting press the F8 key then a boot menu will show in your screen.. if there is drive selection, choose the hard disk drive.. if none then proceed in selecting the Safe Mode menu.. wait until its done booting your windows in safe mode.. after have complete run in safe mode.. properly restart your notebook by going to Start>Turn Off Computer> Restart, and it will boot in windows normally...

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1 Answer

Computer fan is to loud


Do the following:

Reboot your computer.
As it reboots, press the F1 key
When it goes into your bios, look through there until you see a page that allows you to control the fan speed.
change the fan to run more slowly.
Press F10 to save and Exit.

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1 Answer

DELL DIMENSIONS 2300 COOLING FAN


Your system will run fine until the processor starts overheating... why not just replace the fan?

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