Found info that indicates the CMOS battery is probably soldered to the board in this model. I am capable of replacing it, however I don't want to waste the time taking the laptop apart to do that only to find out that a new a new CMOS battery won't fix the problem. What else could cause it to suddenly not boot up? Motherboard failure?
Laptops should still show some signs of life, even if a CMOS battery has died.... I would expect.
It's possible - but typically, on laptops, the CMOS battery is not a standard CR2032 that are typically found in desktops (and are user serviceable).
They can even be soldered to the board, making a replacement difficult (although not impossible).