Lights

Item

Component

Description

 

 

 

(1)

Power lights (2)*

On: The computer is on.

 

 

Blinking: The computer is in the Sleep state.

 

 

Off: The computer is off or in Hibernation.

 

 

 

(2)

Battery light

On: A battery is charging.

 

 

Blinking: A battery that is the only available power

 

 

source has reached a low battery level or a critical

 

 

battery level.

 

 

Off: If the computer is plugged into an external power

 

 

source, the light is turned 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.

 

 

 

(3)

Drive light

Blinking: The hard drive or optical drive is being accessed.

 

 

 

(4)

Wireless lights (2)†

Blue: An integrated wireless device, such as a WLAN

 

 

device, is turned on.

 

 

Amber: An integrated wireless device is turned off.

 

 

 

(5)

Caps lock light

On: Caps lock is on.

 

 

 

(6)

Num lock light

On: Num lock is on or the embedded numeric keypad is

 

 

enabled.

*The 2 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.

†The 2 wireless lights display the same information. The light on the wireless button is visible only when the computer is open. The wireless light on the front of the computer is visible whether the computer is open or closed.

8

Chapter 2 External component identification