Question about Dell Dimension 2400 PC Desktop

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Dell Dimension 2400 won't turn off but goes off/on

Diagnostic lights and lights on front of computer & on keyboard go off/on at one second intervails. A & C take tuens being orange and green. B is always orange and D is always green.

The fan comes on. I have unplugged the computer for hours and when I plug it in the computer goes off /on.

Any ideas?

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  • mtnhikerspat Feb 20, 2009

    I didn't open up the computer because I can see the fan bldes moving during the short time the computer is on. The blades stop moving when the computer goes off. Then it goes on again in rythum with the blinking lights.

  • John Elliott
    John Elliott May 11, 2010

    Some of the Dimension PCs will not remain powered on if the exhaust fan has failed. If you're not afraid to open her up you should verify that the fan underneath the exhaust shroud is operational.

    Has the machine been moved or relocated recently? If so you may want to verify that the ram modules are properly inserted in their respective slots.

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  • 217 Answers

The diagnostic code that you have specified is a memory related issue please try reseating the memory or swapping with a known good compatible memory stick in adverse case it can be the motherboard as you have specified that A & C take turn being yellow and green.
for more instructions please click here to got to a wizard which guides you through the step by step troubleshooting

Posted on Feb 19, 2009

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Posted on Jan 02, 2017

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check here - http://support.dell.com/support/edocs/systems/dim2400/en/sm_en/advtshoo.htm

and here - http://support.dell.com/support/edocs/systems/dim2400/en/F75560LRs.pdf

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HI,
Thanks for the update on the same.Wanted to confirm if you get any beeps like 3-2-4 when you start the computer. Also check the back panel of the system , if the ABCD light are all green . For more on that refer to the page below
http://support.dell.com/support/edocs/systems/dim2400/en/sm_en/advtshoo.htm

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