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Using an optional external numeric keypad
Keys on most external numeric keypads function differently according to whether num lock is on or off.
(Num lock is turned off at the factory.)
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When num lock is on, most keypad keys type numbers.
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When num lock is off, most keypad keys function like the arrow, page up, or page down keys.
When num lock on an external keypad is turned on, the num lock light on the computer is illuminated.
When num lock on an external keypad is turned off, the num lock light on the computer is off.
To turn num lock on or off on an external keypad, press the num lk key on the external keypad, not on
the computer.
Cleaning the TouchPad and keyboard
Dirt and grease on the TouchPad cause the pointer to jump around on the screen. To avoid this, clean
the TouchPad with a damp cloth, and wash your hands frequently when using the computer.
WARNING! To reduce the risk of electric shock or damage to internal components, do not use a
vacuum cleaner attachment to clean the keyboard. A vacuum cleaner deposits household debris on the
keyboard surface.
Clean the keyboard regularly to prevent keys from sticking and to remove dust, lint, and particles that
become trapped beneath the keys. A can of compressed air with a straw extension can blow air around
and under the keys to loosen and remove debris.
Cleaning the TouchPad and keyboard 25