HP ze2000 - Managing Embedded Numeric Keypad

TouchPadandKeyboard
Turning the Embedded Numeric Keypad
On and Off
When the embedded numeric keypad is off, press fn+numIk 0 to
turn the keypad on. The num lock light 0 is turned on.
When the embedded numeric keypad is on, press fn+num Ikto turn
the keypad off. The num lock light is turned off.
2-16 Hardware and Software Guide