Component Description
(3) SIM slot (select models only) Contains a wireless subscriber identity module (SIM). The SIM slot
is located inside the battery bay.
(4) Accessory battery connector Connects an optional accessory battery.
(5) 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 operation.
(6) Expansion memory module compartment Contains the expansion memory module slot and the WLAN
module.
CAUTION: To prevent an unresponsive system and the display
of a warning message, replace the device with only a WLAN
module authorized for use in the computer by the governmental
agency that regulates wireless devices in your country. If you
replace the device and then receive a warning message, remove
the device to restore computer functionality, and then contact
technical support through Help and Support.
(7) Bluetooth compartment (select models only) Contains a Bluetooth device.
(8) Hard drive bay Holds the hard drive.
(9) Primary memory module Located under the keyboard and accessed from the top of the
computer.
(10) Docking connector (select models only) Connects an optional docking device.
Wireless antennae (select models only)
On select computer models, at least 2 antennae send and receive signals from one or more wireless
devices. These antennae are not visible from the outside of the computer.
14 Chapter 2 Components ENWW