HP EliteBook 755 G2 Notebook PC - Manual (Page 24)

Component Description
(3) Service door release lock Locks the service door.
(4) Vents (2) 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) SIM slot (select models only) Supports a wireless subscriber identity module (SIM).
The SIM slot is located inside the battery bay.
Front
Component Description
(1) Wireless light White: An integrated wireless device, such as a
wireless local area network (WLAN) device and/or a
Bluetooth® device, is on.
Amber: all wireless devices are off.
(2) Power light ● On: The computer is on.
● Blinking: The computer is in the Sleep state, a
power-saving state. The computer shuts off
power to the display and other unneeded
components.
● Off: The computer is off or in Hibernation.
Hibernation is a power-saving state that uses the
least amount of power.
(3) AC adapter/Battery light ● White: The computer is connected to external
power and the battery is charged from 90 to 99
percent.
● Amber: The computer is connected to external
power and the battery is charged from 0 to 90
percent.
● 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.
14 Chapter 2 Getting to know your computer