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  1. #1
    Star Lounger
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    motherboard won't powerup

    Set up
    Asus motherboard P8z77-v lx
    PSU OCZ streamline Pro 500w (new)
    Nothing connected to motherboard (brand new) other than the main power plug.
    Shorting the power switch pins on the motherboard either briefly or permanently fails to start the psu which flickers on briefly but then stops.
    PSU will start by shorting pin 4 to earth when disconnected from the psu.
    Another Asus mobo (P8b) will start on this Psu and another good Enermax PSU also fails to start whem connected to the mobo.This is the second P8z77 to exhibit this problem. Am I doing something really stupid?
    Ian

  2. #2
    Bronze Lounger DrWho's Avatar
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    Most motherboards today, have more than just the one power input. Check it out!

    Experience is truly the best teacher.

    Backup! Backup! Backup! GHOST Rocks!

  3. #3
    Super Moderator jwitalka's Avatar
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    Dr Who is refering to the 8 pin power connector for your motherboard in addition to the main power connector as shown below


    mboard.jpg

    Jerry

  4. #4
    Super Moderator CLiNT's Avatar
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    If your specific board supports DIGI+ VRM Digital Power Design, read over your motherboard manual for more (setup) details.
    Put your processor & heatsink-fan assembly on the board, plug in the 8 pin CPU power connector and continue testing.
    Ensure the standoffs are in all in their respective places and not inadvertently horizontal if your working from the case or mobo tray.
    Ensure that you are taking appropriate electrostatic precautions.
    Ensure your memory is compatible and on the QVL list if this is applicable.
    Ensure the mobo BIOS switch is in it's appropriate position.
    Look over the board carefully for bent or broken pins.
    Read your mobo manual, read your mobo manual, read your mobo manual. RMA if all troubleshooting has failed.
    Last edited by CLiNT; 2012-08-04 at 19:01.

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