External component identification
Lights
Item
Component
1
Caps lock light
2
Power lights (2)*
3
Wireless light
4
Num lock light
5
Battery light
6
Drive light
*The two power lights display the same information. The light on the power button is visible only when the computer is open.
The power light on the front of the computer is visible whether the computer is open or closed.
2–2
Description
—
On
Caps lock is on.
—
On
The computer is on.
—
Flashing
The computer is in the Sleep.
—
Off
The computer is off or in Hibernation.
—
Blue
An integrated wireless device, such as a wireless local area network
(WLAN) device and/or a Bluetooth® device, is on.
—
Amber
No wireless devices are detected.
—
On
The num lock is on or the embedded numeric keypad is enabled.
—
On
The battery is charging.
—
Flashing
The battery reaches a low battery level or a critical battery level.
—
Off
If the computer is connected to an external power source, the light is off
when all batteries in the computer are fully charged. If the computer is not
connected to an external power source, the light is off until the battery
reaches a low battery level.
—
Flashing
The hard drive or optical drive is being accessed.
Maintenance and Service Guide