Question about Dell Dimension 8400 PC Desktop

1 Answer

Won't boot Dell 8400

At start up beeps 1 long 3 short 1 long 1 short

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 4 Answers
Re: Won't boot Dell 8400

Could be power supply, video or power switch to name a few. See this diagnostic chart.

Posted on Dec 29, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Dell dimension 8400 pc desktop when pressed power botton orange light comes on and system not booting up

Needs attention from a tech. Could be anything at this point, bad ram, bad/dirty ram slot, failing power supply or motherboard, bad video card... I'll put my money on bad motherboard otherwise I hope you would have wrote that you are hearing beeps. Hope that helps you some.

Aug 10, 2014 | Dell Dimension 8400 PC Desktop

1 Answer


There are 2 basic fans in Dell tower one for the power supply and the other for the Processor. If your computer is not booting then the Processor fan is most likely to be the culprit. What could be happening is that the Processor fan is no longer turning fast enough to cool the processor, so normal the processor when it over heats there is either protection to switch off the computer automatically or the computer won't boot. The best thing is to change the fan and make sure it is working properly but checking on the cables that they won't entangle on top of the fan to impede it's movement. You can easily damage your processor if the fan is not working properly.

Oct 18, 2011 | Dell Dimension 8400 PC Desktop

1 Answer

I get 1 beeb followed by 3 beebs followed by 2 beebs then nothng happens dell diemension 8400

Your computer might emit a series of beeps during start-up if the monitor cannot display errors or problems. This series of beeps, called a beep code, identifies a problem. One possible beep code (code 1-3) consists of one beep, a burst of three beeps. This beep code tells you that the computer encountered a memory problem
you need to reseat your memmry modules just remove them and place them back in the same or a diffrant slot this cold be loose connection by connecting them again you fix it
------------------------------------------------------------ if you dnt know abt it see this it will help you

Apr 10, 2010 | Dell Dimension 8400 PC Desktop

2 Answers

Dell dimension 8400 beeps 6 times monitor dosen't turn on

Below is a link to the beep and light codes for a Dimension 8400. Check your codes and reply back if you need further assistance.

Jun 03, 2009 | Dell Dimension 8400 PC Desktop

1 Answer

Dell 8400 blue screen xoooooo24

if you are getting a series of beeps when powering up, please indicate how many.

Mar 22, 2009 | Dell Dimension 8400 PC Desktop

1 Answer

Dell Dimension 8400 won't boot, cpu fan running like a jet engine

don't worry pal just follow the steps (according to my expeience)

1) turn your computer on.
2) when it is being started keep pressing both DELETE keys (one of Num keys and other one.) without any interval.
3)there will be a set up menu
4)find the boot option and enable it (all option)

i do it on my PC like this only

Jan 12, 2009 | Dell DimensionTM 8400 PC Desktop

1 Answer

Dell Dimension 8400 PC won't boot

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

May 24, 2008 | Dell Dimension 8400 PC Desktop

1 Answer

Dell gx 150

The 6 beeps are an error code. You should note a pattern such as 3 beeps, short pause, 1 beep, short pause, 2 beeps. Also, you may have a set of 4 error indicators on the back of the unit that will show a pattern of green and yellow lights. In any case, you will want to try to run the Dell diagnostics. Let us know the beep pattern and the light pattern and we should be able to give you some more specific information.

Nov 05, 2007 | Dell OptiPlex GX260 PC Desktop

Not finding what you are looking for?
Dell Dimension 8400 PC Desktop Logo

Related Topics:

56 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dell PC Desktops Experts


Level 3 Expert

5660 Answers


Level 3 Expert

18258 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a Dell PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides