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Thread: GA-P55-UD6 does not power on

  1. #1
    Join Date
    Dec 2009
    New Zealand

    Default GA-P55-UD6 does not power on

    I am setting up a new machine with

    GA-P55-UD6 (not sure what BIOS version because it never went that far)
    Patriot PC3-12800 1600 MHz

    Unfortunately it just will not power on, no matter what I do.

    When I try to power on, all LEDs (GD1,GD2,MD1,MD2, and Phase LEDs) briefly flash, the PSU and the HS fans spin up, the Debug LEDs flash C1, and then the system goes dead.

    One of the S4/S5 ACPI led indicators is red initially then it dies with the rest of them.

    I tried with the motherboard on outside the chassis
    Reseated the CPU
    Reapplied the thermal compound
    Tested the PSU (Antec TruePower 650) on another machine (it works)
    Removed the CMOS battery for about an hour.
    Tried the CMOS reset button

    Any suggestions would be much appreciated.

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

    Default Re: GA-P55-UD6 does not power on

    c1 means faulty ram or ram socket,try with just one stick it should boot up test each stick
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  3. #3
    Join Date
    Dec 2009
    New Zealand

    Default Re: GA-P55-UD6 does not power on


    I saw in the manual that C1 is detecting memory, and tried with just one stick with no luck.

    I'll try the other three today. The sticks are brand new so hopefully at least one is good.

  4. #4
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
    Join Date
    Jan 2008
    PCB Island

    Default Re: GA-P55-UD6 does not power on

    If you do not have any luck you may need another brand or type of DDR3 to test with.

    You may also want to check to be sure you have NO Bent or missing CPU Socket pins, if you do check be VERY Careful

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