Had same problem with my old compaq presario 2800. It seemed to happen to me when I installed an updated video driver......... but, what do u know, it caused my logon screen to dissapear. Since HP and Compaq have merged together, I don't know if the keyboard is the same design or not, but this is how i fixed the problem. This is the response I got when I posted my similar question about the missing logon screen: "Try FN+F4 to cycle the video modes. If you can get a display maybe try the ATI driver update as well: http://h10025.www1.hp.com/ewfrf/wc/...item=hb-21505-1" -antioed.

Sounds like it's set to a refresh rate or video mode that the thing can't display to me.

Boot it all the way up, when it's done, hit Alt-F4, and hit the U key after. Do this a few times. If your laptop shuts itself down when you do this, you have successfully told Windows to shut down, so the machine is working, but set to a video mode it cannot display. If you do this several times, and the machine doesn't do a thing, then it isn't completing bootup. See what that gives us to work with.

Sounds like it's set to a refresh rate or video mode that the thing can't display to me.

Boot it all the way up, when it's done, hit Alt-F4, and hit the U key after. Do this a few times. If your laptop shuts itself down when you do this, you have successfully told Windows to shut down, so the machine is working, but set to a video mode it cannot display. If you do this several times, and the machine doesn't do a thing, then it isn't completing bootup. See what that gives us to work with.