HP Pavilion N6xxx Reference Manual page 17

The keyboard status lights, located above the keyboard, indicate the states of the
keyboard locks.
1. Caps Lock. Caps Lock is active.
2. Num Lock. Num Lock is active. (The Keypad Lock must also be on to use the
embedded keypad.)
3. Keypad Lock. The embedded keypad is active (Fn+F8). Num Lock must also be on
for the numeric keys—otherwise, cursor control is active.
4. Scroll Lock. Scroll Lock is active.
Introducing the Notebook Computer
Identifying Parts of the Computer
Reference Guide 17