Processor: AMD Phenom II X4 955(3.2GHz)
Motherboard: Gigabyte AMD 770
OS: Windows 7 (64 bit) Home Premium
Power supply: 700W, don't think it's this.
Wouldn't the video card be relevant here?
Processor - doubt it.
Mobo - eh maybe
OS - do you get video before you start loading windows? During the POST? If you don't then OS is a non-factor. If you do - then maybe we care about OS.
PSU - not likely but lets hear what your video card is.