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External component identification
Maintenance and Service Guide 2–5
Lights
Item Component Description
1
Caps lock light On: Caps lock is on.
2
Power lights (2)* ■ On: The computer is on.
■ Blinking: The computer is in the Sleep state.
■ Off: The computer is off or in Hibernation.
3
Volume mute light ■ White: Computer sound is on.
■ Amber: Computer sound is off.
4
Volume down light On: The volume scroll zone is being used to decrease speaker
volume.
5
Volume up light On: The volume scroll zone is being used to increase speaker
volume.
6
Wireless light ■ On: An integrated wireless device, such as a wireless local
area network (WLAN) device and/or a Bluetooth® device, is
on.
■ Off: All wireless devices are off.
7
Num Lock light
The integrated numeric keypad is enabled, or num lock is enabled
on a connected optional numeric keypad.
(Continued)