Question about Dell Dimension 5100 (D51L1) PC Desktop

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I have a Dell Dimension 5100 Desktop and last night I shut down normally with no issues, then waited a minute and turned off the power strip. Now it will not turn on at all, no lights nothing. I have opened it up and sprayed the dust out, and there is nothing that looks to be wrong with the motherboard, no overheating signs or power scorching. Any suggestions to get this going again, or does it sound like I need a new internal power supply?

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  • 428 Answers

Hi Martz!

After looking at your description I have to say Yes!

  • If your machine doesn't function at all that means it is not receiving power.
  • If you were unable to hear the FAN of the power unit, then there is a greater possibility that the power unit is dead.
  • But if you see any LED indicators on in any area on the mother board that means your power unit is working well or partially.
  • So first check the power CABLE. Then the power unit. You have to check both.
  • Make sure that your Processor FAN functions well.
  • Make sure that your CMOS battery is not dead (0 charge).
Feel free to contact again if the problem persists. Please rate the answer as well!

Thanks for using Fixya!

Posted on Sep 03, 2010

  • Tharinda
    Tharinda Sep 04, 2010

    If you ran the check list and could't solve the issue let me know and we will start diagnosis.
    Before that you have to answer some questions which will help me to understand your knowledge and familiarity as well as how this problem occurred.

    Are you familiar with computers?
    Are you familiar with computer hardware and electronic tools and meters?
    Have you made any hardware changes prior to the problem?
    How did you shut down the machine?
    Does your machine require a special shutdown or does it have a special shutdown mechanism?
    Do you have an alternative machine (Backup)?
    How did you power up the machine?
    Was there any surge or any power imbalance?
    Was there a noise or a burn smell after booting up?


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