You haven't got a video card as well as onboard graphics have you? In any case, as hari says, try just a simple VGA monitor, something other than you are using right now. If you see the boot screen menu then unless you have multiple graphics chipsets you should see the rest until just before the AV Wizard. Although it is possible it could be a weird screen pickiness thing!
It is a monitor that has DVI and VGA inputs, and I tried both. The graphics card itself has two DVI outs, both of which I tried, with and without the DVI->VGA adapter. The keyboard keeps getting initialized repeatedly, so perhaps it is trying to find the proper framebuffer mode, or X modeline (don't know if the installer uses an fb or X).
Debian (testing) installed smoothly, and brought up X fine. I assume it is using the free "nv" driver, I'll have to look more closely later.