Page 26 from 164
(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 the spacebaror the esc key.
Windows key Returns you to the Start screen from an open app or the
NOTE:Pressing the Windows key again will return you to the
(4) Action keys Execute frequently used system functions.
(5) num lk key Alternates between the navigational and numeric functions on
the integrated numeric keypad.
NOTE:The keypad function that is active when the computer
is turned off is reinstated when the computer is turned back on.
(6) Integrated numeric keypad When num lk has been enabled, it can be used like an external
numeric keypad. To alternate between this numeric function
and the navigational function (indicated by the directional
arrows on the keys), press the num lk key.
18 Chapter 2 External component identification
Page 27 from 164
Battery lock and unlock latch Locks and unlocks the battery in the battery bay.
(2) Battery bay Holds the battery.
(3) Vents (5) Enable airflow to cool internal components.
NOTE:The computer fan starts up automatically to cool
internal components and prevent overheating. It is normal
for the internal fan to cycle on and off during routine
Battery release latch Releases the battery.
(5) Speaker openings (2) Produce sound.
Service door Provides access to the wireless LAN (WLAN) module slot,
the memory module slots, and the optical drive bay (select
Page 28 from 164
CAUTION:To prevent an unresponsive system, replace
the wireless module only with a wireless module
authorized for use in the computer by the governmental
agency that regulates wireless devices in your country or
region. If you replace the module and then receive a
warning message, remove the module to restore
computer functionality, and then contact support through
Help and Support. In Windows 78, from the Start screen,
type help, and then select Help and Support.
The labels affixed to the computer provide information you may need when you troubleshoot system
problems or travel in the Netherlands with the computer.
IMPORTANT:All labels described in this section will be located in one of 3 places depending on your
computer model: Affixed to the bottom of the computer, located in the battery bay, or under the service
Service label—Provides important information to identify your computer. When contacting support,
you will probably be asked for the serial number, and possibly for the product number or the model
number. Locate these numbers before you contact support.
NOTE:Your service labels will resemble one of the examples shown below. Refer to the illustration
that most closely matches the service label on your computer.
20 Chapter 2 External component identification
Page 29 from 164
(5)Model number (select models only)
Page 30 from 164
(4)Model number (select models only)
Regulatory label(s)—Provide(s) regulatory information about the computer.
Wireless certification label(s)—Provide(s) information about optional wireless devices and the approval
markings for the countries or regions in which the devices have been approved for use.
22 Chapter 2 External component identification