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Thread: no post no beep

  1. #1
    Join Date
    Oct 2009

    Default no post no beep

    have a gigabyte GA-MA785GM-US2H Brand new, AMD athlon II x2 240 dual core and ultra 2gb ram powerup atx case w/450w ps

    Built this and will not post tried the following;
    change ram, cpu to other machine works
    change ram from working machine to new doesn't work
    tried different ram slots
    tried different power buttons
    have concluded either power supply or MB
    before i send both back
    this motherboard has a 8-pin ATX 12V power connector
    but the power supply has a 4-pin
    this was a barebones kit from tigerdirect
    and after reading the comments people have good results with this
    and no mention of this as a problem
    should this ps work with 4-pin
    any ideas and trick would great thanks in advance

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

    Default Re: no post no beep

    have you plugged in just the four pin cpu power plug? it should boot and run ...the plug will only go in one way and leave four open sockets
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  3. #3
    Lsdmeasap's Avatar
    Lsdmeasap is offline GIGABYTE Guru
    Join Date
    Jan 2008
    PCB Island

    Default Re: no post no beep

    4 pin is never suggested in a 8 pin system, sometimes it will work but just depends on your hardware.

    I always suggest using a proper PSU with the board if it is 8pin, not an adapter. So I would suggest a new EPS PSU or that you return the unit and mention to them that not every system like this will work with a 4pin PSU depending on the hardware connected (Mainly CPU used)

    Did you try it out of the case, off the motherboard tray, and with only the minimal connected such as CPU/Heatsink/ One stick of Ram, and GFX Card ONLY nothing else? While I mention that, are you using a larger GFX Card? If so could be that the PSU Cannot handle that card and board all at once, you may need to test with a smaller GFX Card as well if possible

  4. #4
    Join Date
    Oct 2009

    Default Re: no post no beep

    i have tried mb and cpu with ram still no luck and it is out of the case on piece of cardboard on table.
    a little confused what is the 8-pin used for compared to a 4-pin
    from what i see the 8pin is on the most expensive powers supplies out there
    and a little out of the buget

  5. #5
    stasio's Avatar
    stasio is online now GIGABYTE Elite
    Join Date
    Oct 2007

    Default Re: no post no beep

    Buy 4-pin to 8-pin ATX Cable Adapter.
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  6. #6
    Reggie is offline Junior Member
    Join Date
    Mar 2009
    United States

    Default Re: no post no beep

    Clear the CMOS.

    Do not insert the power supply cables into pins under the protective covers when using a power supply providing a 2x2 12V.

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