I was writing on it just last night, but when I got up to do something and came back, it was dead as a doornail. My husband tested the power cord, and it's delivering current, so it's not that. I tried starting it with only the power cord and not the battery, no dice. So it's something more complicated than that.
Fortunately I backup my work often (all right, that's awful grammar there, sorry), so I didn't lose much, only about 2k words. It's annoying, but not the end of the world. I also have my desktop computer, so it isn't as if this is a real hardship. One thing about being married to a nerd. He's got 2 work laptops and an Ee PC, and in the room I'm sitting in there is a server and another desktop besides the one I'm writing on. All I've really lost is the luxury of writing wherever I feel like it, and even that I could get back if I swipe his Ee PC during the day (which I might do).
And for once I had a laptop last a regular laptop lifespan! This one made it nearly four years. We'll take it apart tonight to see if there's an easy fix.
The moral of the story, back up your work! I do it by emailing to myself. I've got a gmail account I use exclusively for that (though there are other, more sophisticated ways of doing this too). This way I can access it anywhere there is internet.