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Author Topic: PC fails to power on  (Read 1884 times)

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Rebo00 aka Spank

    Topic Starter


    Beginner

    PC fails to power on
    « on: November 23, 2011, 01:09:20 PM »
    Hi guys,
    Really annoying problem.
    The other day I unplugged my PC at the mains (PC was turned off) and then plugged it back in, tried turning it on and nothing happens.
    Unplugged everything from the PC and from the power extension and tried again, fans on the PC spun up for a second but then just stopped.
    Power and Reset lights on Mobo started to flash after this was done.
    Removed everything from Mobo (gfx card, RAM) and tried again still powers on for a second then turns off and lights go back to flashing (to stop the lights flashing I had to turn the PSU off.
    Presumed it was the PSU that had failed so bought a new one (SilverStone Strider Gold SST-ST1000-G).
    Installed the new PSU and plugged everything in and the same thing happens, power for a second or so and then powers off.
    Unplugged everything but Mobo from PSU and tried again, still nothing. Unplugged all RAM and it then powered on.
    Put one stick in, powered on fine, put Mobo 4pin into PSU and it then failed to start, unplugged it and it worked fine again.
    Plugged everything in PSU testing one at a time and they all worked apart from when the HDD was plugged in, that had the same affect as the 4pin Mobo cable.
    Did a few more tests and it's now stopped powering up again even with only the EATX cable plugged in, RAM removed.
    Unlike before when it fails to power up the Power and Reset lights do not flash, they remain constant.
    Checked all components none, look singed or bulged. Checked CPU and it looks fine.
    When the machine did power on even with it plugged into the monitor nothing was displayed.
    Any help is appreciated :).
    Mobo: ASUS P6T
    CPU: Intel i7 (Corsair H50 water cooling)
    RAM: 6GB Corsair Dominator
    PSU: SilverStone 1000watt
    GFX: Nvidia GTX295