HP EliteBook 720 Maintenance and Service Guide - Page 20

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Component Description (6) Internal display switch Turns off the display or initiates Sleep if the display is closed while the power is on. NOTE: The display switch is not visible from the outside of the computer. *The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around the antennas free from obstructions. For wireless regulatory notices, see the section of the Regulatory, Safety, and Environmental Notices that applies to your country or region. To access this guide: Windows 7: Select Start > Help and Support > User Guides. Windows 8.1: From the Start screen, type support, and then select the HP Support Assistant app. Windows 10: Select Start, select All apps, select HP Help and Support, and then select HP Documentation. Front Component (1) Wireless light (2) Power light (3) AC adapter/Battery light 10 Chapter 2 External component identification Description On: An integrated wireless device, such as a wireless local area network (WLAN) device and/or a Bluetooth® device, is on. NOTE: On some models, the wireless light is amber when all wireless devices are off. ● On: The computer is on. ● Blinking: The computer is in the Sleep state, a powersaving 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. NOTE: For select models, the Intel® Rapid Start Technology feature is enabled at the factory. Rapid Start Technology allows your computer to resume quickly from inactivity. ● 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.

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Component
Description
(6)
Internal display switch
Turns
off
the display or initiates Sleep if the display is closed while
the power is on.
NOTE:
The display switch is not visible from the outside of the
computer.
*The antennas are not visible from the outside of the computer. For optimal transmission, keep the areas immediately around the
antennas free from obstructions. For wireless regulatory notices, see the section of the
Regulatory, Safety, and Environmental Notices
that applies to your country or region. To access this guide:
Windows 7
: Select
Start > Help and Support > User Guides
.
Windows 8.1
: From the Start screen, type
support
, and then select the
HP Support Assistant
app.
Windows 10
: Select
Start
, select
All apps
, select
HP Help and Support
, and then select
HP Documentation
.
Front
Component
Description
(1)
Wireless light
On: An integrated wireless device, such as a wireless local
area network (WLAN) device and/or a Bluetooth® device, is
on.
NOTE:
On some models, the wireless light is amber when
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.
NOTE:
For select models, the Intel® Rapid Start
Technology feature is enabled at the factory. Rapid Start
Technology allows your computer to resume quickly from
inactivity.
(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.
10
Chapter 2
External component
identification