HP Pavilion dm4 - Illustrated Parts Catalog; Serial Number Location

Keys
Component Description
(1) esc key Displays system information when pressed in combination with
the fn key.
(2) fn key Displays system information when pressed in combination with
the esc key.
(3) Windows logo key Displays the Windows Start menu.
(4) Windows applications key Displays a shortcut menu for items beneath the pointer.
(5) Action keys Execute frequently used functions.
Top components 9