Question about Dell Dimension 5100 (D51L1) PC Desktop

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Pover up trouble

5100 power up trouble start switch hit and one of the fallowing errors happen
1 power light turns yellow and flashes at rate of once per second
2 power light starts green then turns yellow and flashes as above described
3power light starts green then yellow and flashing then back green for a second or two then yellow again and flashing it may do this sequence 2 or 3 times before finally flashing yellow.

in all scenarios power supply & cpu fans and hard drive run when green light is on.

if i remove the 12v power conector from the mother board . then hit start fans & hard drive operate when start button is hit however no green light and
yellow light stays on steady. test the supply power voltage at mother board connector and is 12v. all conections have been reseated and a new power switch assembly has been installed with no change. all capasitors have been visualy inspected for bulging or leakage.

the green power light is on on the motherboard in all senarios

if i attempt to plug the 12v power connector into the motherboard after starting the computer without it connected to the motherboard as soon as the conector is conected the yellow light begins to flash and all fans and hard drive stop.

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  • Anonymous Apr 20, 2009

    im having the same problem, its something to do with either
    a) motherboard
    b) power supply

    whichever one it is they are tricky to fix, so looks like im going back to dell to give the indianesians more of my hard earned cash

    i bet the programmed the pc's to mess up like this so they get more money, because i done nothing wrong to make this problem happen!

  • Anonymous Mar 22, 2014

    Start up light is blue/normally what it is. No idea why it powers on but will not display monitor, moose, keyboard. All work fine on other computer.

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Sounds like something is drawing down on your 12 volt supply drives or on board regulators. Try it without the drives connectged, and see if you can get the system to boot up(you'll just get a notice that your drives are unavailable, but you'll already know that, right?

got backup for your Dell?

Posted on Feb 15, 2008

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