Question about Dell Dimension E521 PC Desktop

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Computer lock down

The front of the CPU displays the number 1 through 4. when I turn the computer on, it cycles through the numbers and then locks up and shuts down. recently, the cycling stops at 3 before it once again locks up and shuts down

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  • 78 Answers

Hi mcgriff2000
Those lights on the front panel are called diagnostic lights, these help in identifying the hardware fault in the system if any.
What I have understand from your statement is that your system shuts itself down after turning 3rd light on. I mean only the third light.
or
the sequence of lights 1,2,3 are on.
if only the 3rd light is on it indicates that there is a possible processor failure and you need to speak to Dell Tech support and get it replaced.
If the sequence of lights on are 1,2,3, then some cable inside the system is either disconnected or not connected properly. You need to open it and reseat all the cables.
If you have some other color sequence or you wish to more details as why you are facing this issue, please look at the following link

http://support.ap.dell.com/support/edocs/systems/dime521/en/SM_EN/adtshoot.htm#wp1056411

If you wish to reseat the cables inside the system, here is a link, which will provide you complete detailed pictured details .
Step1 ) Go through the following link, Before you open the system.
http://support.ap.dell.com/support/edocs/systems/dime521/en/SM_EN/before.htm#wp1053346
Step 2) Follow the steps
http://support.ap.dell.com/support/edocs/systems/dime521/en/SM_EN/parts.htm#wp1043338

Following is the link to your system's User manual.
http://support.ap.dell.com/support/edocs/systems/dime521/en/OM_EN/PY349A03MR.pdf

http://support.ap.dell.com/support/edocs/systems/dime521/en/index.htm

If your issue is still not resolved, please let me know.
This solution is absolutely FREE, please rate and give positive feedback.
Thanks :)

Posted on May 10, 2010

  • TapsCompWiz May 10, 2010

    From reseat I mean disconnect and reconnect.

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Posted on Jan 02, 2017

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Procedure:
01. Turn the ignition ON (The radio displays LOC)

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