Lenovo IdeaPad U400 - Manual (Page 15)

Chapter 3. Learning the basics
11
To wake the computer, do one of the following.
• Press the power button.
• Press any key on the keyboard.
„ Shutting down your computer
If you are not going to use your computer for a day or two, shut it down.
To shut down your computer, click and select Shut down from the Start menu.