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2–6 Maintenance and Service Guide
External component identification
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) Treble light On: The treble function is on.
(7) Bass light On: The bass function is on.
(8) Treble/bass down light On: The treble or bass scroll zone is being used to decrease the level of treble
or bass in the audio.
(9) Treble/bass up light On: The treble or bass scroll zone is being used to increase the level of treble
or bass in the audio.
(10) Wireless light ■ Blue: 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.
(11) Num lock light On: Num lock is on or the embedded numeric keypad is enabled.
(Continued)