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Component Description
(4)
Wireless button Turns the wireless feature on or off but does not establish a
wireless connection.
(5) Fingerprint reader (select models only) Allows a fingerprint logon to Windows, instead of a
password logon.
Keys
Model 4540s
Component Description
(1) esc key Displays system information when pressed in combination
with the fn key.
(2) fn key Executes frequently used system functions when pressed
in combination with a function key, the num lk key, the esc
key, or other keys.
(3)
Windows logo key Displays the Windows Start menu.
(4) Function keys Execute frequently used system functions when pressed in
combination with the fn key.
(5)
Windows applications key Displays a shortcut menu for items beneath the cursor.
(6) num lk key Alternates between the navigational and numeric functions
on the integrated numeric keypad.
(7) Integrated numeric keypad Can be used like an external numeric keypad.
12 Chapter 2 External component identification