HP Pavilion DV4000 Hardware And Software Manual page 73

Turning Num Lock Mode On and Off
As You Work
To turn num lock mode on or off on an external numeric keypad
as you work, press the
not on the notebook.
When an external numeric keypad is turned on and is in num
lock mode, the num lock light on the notebook is on.
When an external numeric keypad is turned off or is turned
on with num lock mode turned off, the num lock light on the
notebook is off.
Hardware and Software Guide
key on the external numeric keypad,
num lk
Keyboard and TouchPad
3–17