My laptop is two years old now, and for the most part, I haven't had any problems with it.  Part of the casing cracked, but I duct taped it, and since then it's been working fine.

But today I was looking at stuff online when suddenly it locked up completely and I heard a beep.  I figured it was no big deal because the battery was out of juice.  I went to class, and when I was done, got back on, plugged it in, and turned it on.

Nothing was working right.  The screen went blank and the computer just restarted itself.  I was pretty freaked out, but everything worked okay in safe mode.  This lead to the discovery that my graphics card was the problem.  With it disabled, my laptop runs fine (though it has horrible frame rate).  But the problems don't end there.  For some reason, I can't put my laptop into hibernation mode, which is a major inconvenience.  I looked at the power options in the control panel, and the hibernation and standby tabs are completely gone. 

I'm really upset because everything's been working great, and the day before NaNoWriMo, it totally flips out on me. 

Is there a way to replace a video card in a notebook, or at least check to see if it's been bumped out of place or something?  I think the video card has something to do with the hibernation, but I'm not sure.

Any help would be wonderful.