I would go back somewhat in the build and disconnect the hard drive and 
the combo drive. If the MB has on-board video, remove the video card. If 
the BIOS permits, reset the BIOS to some sort of overall "safe" settings 
or at least "default" settings.Than try to boot the machine with just 
PS, MB, CPU and RAM.

I am assuming that you have checked to make sure the CPU and RAM are 
compatible with the MB. I would recheck the manual to make sure the MB 
does not require some manual jumper settings to match the CPU and/or RAM 
features. Also, I would recheck the seating of the CPU and RAM to make 
sure they are firmly in place.

If you are using more than one stick of RAM and depending upon the MB 
requirement for RAM placement, you might try various placements and 
amounts of RAM.

If there is still a problem, let us know.

Tom


On 2/27/2010 6:03 AM, Matt Puchta wrote:
> I have just completed a new build and was doing the first boot and it gets as far as updating DMI and just sits there,  I can restart and go into the bios setup and go through all functions in the BIOS but it will not boot.  The system uses a Gigabyte MA785GM-US2H Mobo with an AMD Phenon II x2 545 CPU, a Gigabyte 4650 video card, Western digital 750GB harddrive and a Liteon SATA combo drive.
>                
>

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