HP EliteBook 8740w Mobile Workstation - Manual (Page 22)

Component Description
(4) 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.
(5) Memory module compartment Contains the memory module slots, a WWAN module, and a WLAN
module (select models only).
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 technical support through
Help and Support.
(6) Bluetooth compartment (select models only) Contains a Bluetooth device.
(7) Hard drive bay Holds the hard drive.
(8) Accessory battery connector Connects an optional accessory battery.
(9) SIM slot (select models only) Contains a wireless subscriber identity module (SIM). The SIM slot
is located inside the battery bay.
Display components
10 Chapter 1 Features