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New Build: Phase lights flash (does not post)

Last response: in Motherboards
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September 18, 2010 3:02:13 AM

I have the parts listed in my post here: http://www.tomshardware.com/forum/294380-31-advice-sugg...

Quick summary:
Quote:

  • GIGABYTE GA-P55A-UD3 LGA 1156 Intel P55 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

  • Intel Core i5-760 Lynnfield 2.8GHz 8MB L3 Cache LGA 1156 95W Quad-Core Desktop Processor BX80605I5760

  • 2x G.SKILL ECO Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-4GBECO

  • XFX Black Edition P1-750B-CAG9 750W ATX12V v2.2 / ESP12V v2.91 SLI Ready CrossFire Ready 80 PLUS SILVER Certified Modular Active PFC Power Supply

  • GIGABYTE GV-N460OC-1GI GeForce GTX 460 (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card


  • I have the motherboard on a non-conductive surface (a book), with the processor (and cooling), 1 dimm of memory (in the slot closest to the processor), and the video card attached.

    The CPU fan is connected to the CPU_FAN port.

    I have the 24/20 pin main power connector connected to the ATX port on the motherboard. I have the 6-pin portion of the two 6/8 pin PCI Express connectors connected to the two corresponding ports on the video card. I have none of the modular cabling attached to the power supply.

    The case's power switch wire is connected to the power pins on the F_PANEL.

    My understanding is that this is the simplest configuration (and is therefore where I should begin testing). This is my first time building a machine by myself, so it's possible that there's something silly I forgot to do/connect.

    When I turn on the power supply (using the switch on its rear) and then press the power button on the case, the phase LEDs light up, the fans (processor and video card) begin to rotate, I hear a single "click" sound, and the LEDs go off, and the fans wind down. About a second later, the process repeats.

    Any suggestions?

    Best solution

    a c 234 V Motherboard
    September 18, 2010 4:15:55 AM
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    1) Do you have your 8-pin ATX plugged in next to your CPU?

    2) Read through this thread for more tips!! http://www.tomshardware.com/forum/261145-31-read-postin...
    a c 156 V Motherboard
    September 18, 2010 4:21:17 AM

    http://www.tomshardware.co.uk/forum/261145-13-perform-s...

    Work through the thread. It should help you find your problem.

    ALso, while you have your system breadboarded, remove the video card and RAM. Boot with just the CPU & HSF, motherboard, PSU, and system speaker. If everything is working at this point, you should hear a continuous series of long beeps - indicates the you have no memory present.

    Silence indicates that you have a problem with, in most likely order, the PSU, motherboard, or CPU.
    Related resources
    September 18, 2010 11:29:16 AM

    Sounds very much like the problem I had with the second motherboard (GA-P55A-UD3) I got to replace the first one that went dead.

    Just a few of questions.

    Do you have the other 8 pin power cable hooked to the other side of the board?

    Do you have a internal speaker hooked up to F_Panel?

    Did you mount the single stick of memory in DDR3_1?

    My post for the same problem is here http://www.tomshardware.com/forum/280228-30-motherboard... where I have gone through the same troubleshooting.

    jsc' reply to you got me a long series of short beeps and if you look at my post it seems to come back around to bad MB.

    I did not try the Gigabyte Guide http://www.tomshardware.com/forum/275856-30-gigabyte-gu... about "boot loops" which is where it sounds like you and I both ended up at.

    I just RMA'd my board yesterday, I am interested to know if you can get something from the "boot loops" troubleshooting.

    BTW my first board posted correctly right out of the box before it locked up three weeks later never to boot for me again.
    September 25, 2010 11:53:32 AM

    Best answer selected by zjs.
    !