HP ProBook 4720s Notebook-PC - Manual (Page 19)

Component Description
(2) Vent Enables 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.
(3) External monitor port Connects an external VGA monitor or projector.
(4) RJ-45 (network) jack Connects a network cable.
(5) HDMI port Connects an optional HDMI device.
(6) Combo eSATA/USB port Connects an optional USB device or an optional high-performance
eSATA component, such as an eSATA external hard drive.
(7) USB port Connects an optional USB device.
(8) ExpressCard slot Supports optional ExpressCards.
Bottom components
Component Description
(1) Battery release latches (2) Release the battery from the battery bay.
(2) Battery bay Holds the battery.
(3) SIM slot (select models only) Contains a wireless subscriber identity module (SIM). The SIM slot
is located inside the battery bay.
Display
NOTE: Your computer may look slightly different from the illustration in this section.
Identifying hardware 9