Question about Dell Dimension 5150 (DIM515MIN) PC Desktop

2 Answers

No power no light

Try to turn on power but doesnt do anything. not even a light. could this be a motherboard problem or power supply?

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  • nimsnuts Jan 02, 2008

    I was having the same problem, I bought and installed a new power supply, and a new HD (the nerd at comp usa supposedly checked the drive to see if it was good and told me I needed a new one) but the computer wouldn't boot. I was thinking maybe the motherboard was bad. I read the solution posted here and did the test on the power supply and the old one was good, then I tried the toggle switch thing and it started right up. Thanks so much for saving me time and money.

  • David Cruz
    David Cruz Jan 04, 2008

    Thanks everyone for all your help.

  • David Cruz
    David Cruz Jan 04, 2008

    Thank you for your help.

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Hello I just wanted to let you know I have had the same problem and Had to replace the mother board. The computer has been working fine ever since look inside your computer and see if you see a green light on inside on the mother board you should be able to see it on by looking thru the back vents, Check it out, Also so when you plug in the power cord do you hear the fan turn on for a second or two. If not, and you see the green light on the mother board, I would say its the mother board I would also suggest replacing the power supply, Dell will recommend that and I do to. Its about 139.00 dollars for both from Dell. Hope that gets you up and going . bear001

Posted on Jan 04, 2008

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Could be either one, or it could be the toggle switch.

Start with the easiest first to check. Unplug the power toggle switch from the mainboard and take a screwdriver or something and short out those two pins to see if it starts the pc. if it does, then your pc case switch is just bad.
If that's not the problem, check the power supply next.

Jumper the ATX 20 pin power cable's green wire to any black, just to make sure the power supply is working. The fans in the power supply will turn on along with anything else hooked up.

To jumper the power supply use a section of wire or a bread twisty (with the insulation removed from the ends) and just connect the green wire to any black wire on the 20 / 24 pin power connector. Make sure that the power switch on the back of the power supply is switched on.

If neither of those seem to be the problem, then most likely it is the motherboard or the processor.

Posted on Dec 21, 2007

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