OK, are u booting from the GPU or the iGPU?
If it is a GPU card, make sure it has the power connected.
I've booting w/o the GPU (connected via HDMI) and w/ the GPU and still no display. I've tried testing the monitor out w/ my laptop via a vga connection and it works fine also.
it the ram and mb it can set the right speed to post. try power in and then press the mem ok button to see if you can get the mb out of the boot loop. if not remove all the dimms but one and see if she post if not see if someone has another dimm.
The problem is I can't even see anything on my screen and its the only monitor I have...so I can't even go in and see if I can do anything besides messing w/ the hardware components.
I've attached a picture of the insides but idk if that will help...I know nothing. http://imgur.com/H8J5V