Have an alienware 7700 duel amd processor that i've installed vista on several months ago. I've had an increasing problem where the comp doesn't like to boot up. It's like power goes on, then off, and repeats until i manually shutdown and try again. But lately i can't boot it up at all, and once in a while the screen goes white, where as before it was black. Neideas? i tried testing each ram stick individually and still had same issue. Tried with battery and w/o battery. Let me know, thanks.