Thank you so much for your reply. There is no led on the laptop to indicate whether it is plugged in, but there is an led on the charger unit to indicate that IT is getting power. It is on. The only led on the laptop itself is next to the power button, which turns on when the unit turns on. But I press the power button, nothing happens to this led or the screen--it does not turn on. No beep codes, no fan, nothing: it's like it isn't getting any power at all, even though the charger says it is getting power.
The battery is internal. I did take the case off to check for water damage (unlikely, but I do have a young child at home, so I thought I'd check), and saw nothing that looked wrong. Of course, I am way out of my depth with this. I have experience working on desktop hardware, but this is the first laptop I have ever had an issue with, and certainly the first ultrabook. I don't know what to do next.
Are you saying I need to take it to the shop? Is ther any further testing I can do on my own?
Should I take it apart again and take out the battery, as you mentioned? I wasn't sure that would apply to an internal battery . . .
Thank you again!