HP Notebook Series Reference Manual page 13

Getting Started with Your Notebook
The keyboard status lights, located above the keyboard, indicate
the states of the keyboard locks.
1
Caps Lock On: Caps Lock is active.
2
Num Lock On: Num Lock is active. (The Keypad Lock must also be
on to use the embedded keypad.)
3
Keypad Lock On: The embedded keypad is active (Fn+F8). Num
Lock must also be on for the numeric keys. Otherwise, cursor control
is active (as marked on an external keyboard).
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