HP 421 Notebook-PC - Manual (Page 21)

Left-side components
Component Description
(1) ExpressCard slot Supports optional ExpressCards.
(2) 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.
(3) 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.
(4) External monitor port Connects an external VGA monitor or projector.
(5) Battery light ● Amber: A battery is charging.
● Turquoise: A battery is close to full charge capacity.
● Blinking amber: A battery that is the only available power
source has reached a low battery level. When the battery
reaches a critical battery level, the battery light begins
blinking rapidly.
● Off: If the computer is plugged into an external power
source, the light turns off when all batteries in the computer
are fully charged. If the computer is not plugged into an
external power source the light stays off until the battery
reaches a low battery level.
(6) Power connector Connects an AC adapter.
(7) RJ-45 (network) jack Connects a network cable.
(8) HDMI port Connects an optional HDMI device.
(9) USB port (1) Connect optional USB devices.
Bottom components
NOTE: Refer to the illustration that most closely matches your computer.
Identifying hardware 9