Question about Dell Dimension 5100 (D51L1) PC Desktop

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Dell Dimension 9100 will not power up

Turned off the machine after a tornado warning in our area. Everything else works power wise in the house but my Dell. There is a green light on inside the case.

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  • mcbride7 Nov 09, 2008

    Kids dell 9100 died. Initally green light on power button. Cycled ATX connection @ motherboard and power cord. Started ok, (for me). 2 weeks later my kid brought the computer over with her for me to look at. Now no green power button light. Only single aux led on motherboard. Cycled connections to ATX supply, daughter board on front of computer as well as on MB, blew out .5 pounds of dust bunnies. Tested power-on microswitch, OK. Still dead. Shorted green wire on atx to ground wire to test supply. All drives spin up, all non-black wires have the expected 3.3, 5, 12 volts (tested with no diagram). But all are positive, should't there be some negatives? I will look that up but for now that is all the info I can give.

  • Anonymous Jan 17, 2009

    After a power surge computer was unresponsive but had front lights on.

    After turning off the pwer strip the green light on in case power button is unresponsive.

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Most likely the power supply have failed. Although the system is getting some power to the Motherboard (Flea power indication on motherboard) there are at least 5 different voltages the power supply provides for the system. Losing any one can cause a no power situation like you describe.

A standard ATX power supply should resolve (It is the 1st item I'd replace, both because it is the 1st point of failure and the cheapest to replace)

Here is one ATX power supply:

http://www.newegg.com/Product/Product.aspx?Item=N82E16817182030

Posted on Jun 13, 2008

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Update, My (kids) Dell 9100 has a 24 pin ATX supply. PIN 8 (PWR_OK) has 5 volts. All other pins have voltages as per pinout with the exception of pin 20 (-5 volts). There is no wire from the supply for that pin.

Posted on Nov 09, 2008

Swimmom626Did this solve your problem??
I am getting the same thing.
I have tested the switch and the Motorboard on the Switch, also the IDE Cable that connectes the switch to the Motherboard. And of course the Power Supply.

I am thinking it is time to change the Main Motherboard??

Posted on Sep 21, 2008

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