Question about Dell Dimension 4550 PC Desktop

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I received a dead Dell Dimension 4550 from a neighbor and when powered up, is showing green A & B and yellow C & D diagnostic lights. What is the problem?

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  • lorne_kimmel Nov 08, 2010

    It won't even boot to BIOS or display the Dell splash screen.

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  • Dell Master
  • 6,487 Answers

When those 4 lights are all solid green it means that computer has power up fine and just cannot load the operating system , so what you can do here is to try reloading operating system on the computer and also see if there;s any display coming on its monitor and also listed for any beep code.

This documentation from DELL will be a big help in troubleshooting this computer, click HERE.

Posted on Nov 08, 2010

  • Mark Gil
    Mark Gil Nov 08, 2010

    OK thank you for the update, this computer can have a bad motherboard already, you can do the reset of jumper settings on the motherboard to clear cmos and by the way the steps can be located on the documentation site that I provided you earlier.

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This chart is where I got my conclusion.

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Suggested Resolution
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