Question about Dell Dimension 8400 PC Desktop

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Dell 8400 runaway fan no diagnostic lights and very ocassionally it starts normally

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Has anybody tried replacing the video card? I also found a video on youtube that says in the comments that when he replaced the cpu the pc came back to life.

Posted on Jul 07, 2012

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Dell 8400 CPU fan runaway, system will not boot, F2, F8 or F12

Posted on Jul 22, 2010

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Which fan?, the cpu fan or the cpu fan?

Most Dell pc come with a below average power supply. I recommend replacing your power supply with a better one. Do a search on Google for a good replacement power supply for you Dell 8400.

Please rate response.

Posted on Feb 17, 2009

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Unable to connect monitor, wireless mouse, KEYBOARDetc to dell 8400. Diagnostic lights b and dare yellow


http://www.fixya.com/TipsAndTricks/preview.aspx?thid=4282412
Video card failure
Re-seat video card, if no change replace it.

Aug 20, 2011 | Dell Dimension 8400 PC Desktop

1 Answer

Cpu fan fast bios wont start


Run the Dell Diagnostics to test the Fan.
Check to make sure the fan power connector is connected to the mother board.
The fan could be defective.
Reset BIOS to factoiry default settings.
I hope this helps.
Good luck and have a pleasent day.

May 16, 2011 | Dell Dimension 8400 PC Desktop

1 Answer

Dell dimension 8400 will not start.


no man try to take out the modem ( last pci slot on the botom of the board) and see if you have any luck if not you going to need a new motherboard thanks and good luck

Oct 11, 2009 | Dell Dimension 8400 PC Desktop

2 Answers

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.

Jul 01, 2009 | Dell Dimension 8400 PC Desktop

2 Answers

Dell 8400 steady amber light, no diagnostic LEDs, high turbo fan


you will need to change your processor is like it is bad.

Apr 04, 2009 | Dell Dimension 8400 PC Desktop

2 Answers

Your Dell 8400


The fans running full tilt indicate a NO POST condition, normally a motherboard failure

Aug 25, 2008 | Dell Dimension 8400 PC Desktop

1 Answer

Dell Dimension 8400 PC won't boot


http://www.computerhope.com/beep.htm

Here's a list of Boot Codes .....start with one stick of Ram

May 24, 2008 | Dell Dimension 8400 PC Desktop

4 Answers

Woes with Dell


If the power light is steady amber, a device might be malfunctioning or incorrectly installed.

Disconect fan , see if it starts.

Jan 13, 2008 | Dell Dimension 8400 PC Desktop

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