HP ProBook 4420s HP ProBook 4320s, 4321s, 4420s, and 4421s Notebook PCs - Mai - Page 24

Left-side components - fan

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Left-side components Component (1) Security cable slot (2) Power connector (3) AC adapter light (4) Vent (5) External monitor port (6) RJ-45 (network) jack (7) HDMI port (8) Combo eSATA/USB port (9) USB port (10) ExpressCard slot Description 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. Connects an AC adapter. ● On: The computer is connected to external power and the battery is charging. ● Off: The computer is not connected to external power. 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. Connects an external VGA monitor or projector. Connects a network cable. Connects an optional HDMI device. Connects an optional USB device or high-performance eSATA components, such as an eSATA external hard drive. Connects optional USB device. Supports optional ExpressCards. 16 Chapter 2 External component identification

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Left-side components
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.
(5)
External monitor port
Connects an external VGA monitor or projector.
(6)
RJ-45 (network) jack
Connects a network cable.
(7)
HDMI port
Connects an optional HDMI device.
(8)
Combo eSATA/USB port
Connects an optional USB device or high-performance eSATA
components, such as an eSATA external hard drive.
(9)
USB port
Connects optional USB device.
(10)
ExpressCard slot
Supports optional ExpressCards.
16
Chapter 2
External component identification