Dell Alienware M17x R3 (Early 2011) - Manual (Page 34)

CHAPTER 2: GETTING TO KNOW YOUR LAPTOP
32
Status Lights
The three status lights are located at the top-left side of the keyboard. For the exact location,
see “Computer Base and Keyboard Features” on page 30.
Scroll Lock Light
Turns on when the scroll lock option is on.
Caps Lock Light
Turns on when the keyboard is in Caps Lock mode. In this mode, all characters you
type are in uppercase.
Number Lock Light
Turns on when the keyboard is in Num Lock mode. In this mode, the embedded
numeric keypads can be used.