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Thread: Z77X-UD5H WiFi not starting

  1. #1
    Join Date
    Nov 2012

    Default Z77X-UD5H WiFi not starting


    I have just assembled my new PC, but must have made a basic mistake with cabling as when I turn it on the LED goes on for about 1 second, then everything just shuts down. The board the the 1.1 version of the Z77X-UD5H WiFi - no OS installed yet, just wanted to get into the BIOS as step one. Are they any standard trouble shooting guides, or does anyone know what it means when I get stuck so early in the boot process.


    GA Z77X-UD5H
    Intel i7 3770 3.5GHz
    4 x 4GB Corsair Vengeance
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    Corsair AX650W Power supply
    Lian Li Case

  2. #2
    Join Date
    Aug 2009
    Birmingham,Great Britain

    Default Re: Z77X-UD5H WiFi not starting

    try with just one ram stick installed,no gpu and no ssd/hdd attached,then see if it boots into bios,if not pop out the mb battery for 30mins/put back in and try

    make sure the 4 or 8 pin cpu pwer plug is plugged into the mb along with the 24pin power plug from your psu
    Gigabyte z77x UP4-TH F11c Modded Bios
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  3. #3
    Join Date
    Nov 2012

    Default Re: Z77X-UD5H WiFi not starting


    Problem was additional power cable for the CPU - I thought it was only needed for overclocking, seems it is needed for standard installation as well. I did reset the CMOS via the reset button on the MB, and of course stripped it all back and added components one at a time. But I am pretty confident the problem was the cable.

    Installed OS X ok using UniBeast, next step is Multibeast.

    Thanks again.

  4. #4
    Join Date
    Mar 2009

    Default Re: Z77X-UD5H WiFi not starting

    Whew! glad it was just a additional power cable for the CPU which is directly related to OP's failure to comprehend the basics of building a new system.

  5. #5
    profJim's Avatar
    profJim is offline Chief Munchkin + moderator
    Join Date
    Dec 2008
    Tacoma, WA. [USA]

    Default Re: Z77X-UD5H WiFi not starting

    All modern ATX systems require the 4-pin ATX_12v or the 8-pin EPS12v power supply cable to be connected to the motherboard.
    As far as I know, no motherboards will post if you haven't connected one of these cables.

    If you re-read the mobo assembly instructions, you'll see that connecting these cables is not optional.

    When all else fails RTFM

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