Key Components are:
ASUS M4N72-E motherboard
AMD Phenom II X4 945 Deneb 3.0GHz
4GB (4 x 1GB) 4-4-4-12 DDR2 800 RAM
eVGA 8800 GTS 640mb PCI-E video card
My symptons are that upon initial power up, fans came up, no video, no post.
I tried some different configurations. One stick of RAM, ect, still nothing.
I then tried to clear the CMOS. After that the computer would not "hang" prior to post but actually cycle on then off continuously, until I pull the plug.
I tried another wire setup with only the 20 pin power cable, from the supply, plugged into the 24 pin board input, and the 4 pin 12V cable removed. The computer would then power up but fail to post as expected and no power cycling was present. Once I plugged in the 4 pin 12V cable the power cycling (and still no post) returned.
I think I am underpowered from my power supply which is a 500W modular cable continuous supply model. There for I plan to grab a 750 - 850W model on the way home and try that.
Any other thoughts to consider?
I have reviewed the boards and will give some other things, like starting up the board outside the case, once I get home tonight a shot. Thanks.