Computer starts but no display?

Hey guys i'm trying to upload a video on youtube about my problem but until that happens i'll just try and explain whats happening. so over the last month this has happened 3 times, just this time i can't figure out how to fix it, and even if i do it seems to come back. So what happens is after i'm done using my computer with a samsung display and an asus display i'll turn it off, and the next day i'll turn the computer back on but both screens will be black and i'll hear the windows 7 start up sound but nothing on the display. I've then restarted unplugged my Asus display (which seems to usually be the problem) then restart and sometimes, it will load up totally fine with my samsung display. but when i try to plug in my asus, it doesn't work. now granted i can use my computer with one display (sometimes) but i would like to be able to use both monitors. So what i've tried is using the Clear Cmos button on the back of my Asus Rampage IV extreme and sometimes thats worked, as in the other 2 times i've had this problem that fixed it, but this time that fix isn't working. i've also tried turning one of my GTX 480's off and running the other to see if its a graphics issue, which it isn't. and i've ran both monitors on either graphics card on or off, as well as one or the other. nothing worked. again its very confusing and i'm really trying to get a video uploaded to help you follow along.

http://www.youtube.com/watch?v=EHgS_szSWMo&feature...

its currently being uploaded.