Lights
Table 2-5  Lights and their descriptions
Component Description
(1)   Power light  ● On: The computer is on.
● Blinking: The computer is in the Sleep state, a power-saving state. The 
computer shuts o power to the display and other unneeded components.
● O: The computer is o or in Hibernation. Hibernation is a power-saving 
state that uses the least amount of power.
(2)   Caps lock light On: Caps lock is on, which switches the key input to all capital letters.
(3) Mute light ● On: Computer sound is o.
● O: Computer sound is on.
(4) Microphone mute light ● On: Microphone is o.
● O: Microphone is on.
(5) Num lk light On: Num lock is on.
(6) 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 o.
(7) Sharing or presenting light On: Sharing is on.
12 Chapter 2   Components