HP ProBook 4320s Notebook-PC - Manual (Page 21)

Component Description
(1) USB ports (2) Connect optional USB devices.
(2) RJ-11 (modem) jack (select models only) Connects a modem cable.
(3) Optical drive (select models only) Reads optical discs and, on select models, also writes to optical
discs.
(4) Optical drive light (select models only) Blinking: The optical drive is being accessed.
(5) AC adapter light ● On: The computer is connected to external power and the
battery is charging.
● Off: The computer is not connected to external power.
(6) Power connector Connects an AC adapter.
Left-side components
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1) Security cable slot Attaches an optional security cable to the computer.
NOTE: The security cable is designed to act as a deterrent, but
it may not prevent the computer from being mishandled or stolen.
(2) Power connector Connects an AC adapter.
(3) AC adapter light ● On: The computer is connected to external power and the
battery is charging.
● Off: The computer is not connected to external power.
(4) 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.
Identifying hardware 9