Lenovo ThinkPad S540 User Manual page 24

1 Fn Lock indicator
The Fn Lock indicator shows the status of the Fn Lock function. For more information, see "Special keys"
on page 24.
2 Speaker mute indicator
When the speaker mute indicator is on, the speakers are muted.
3 Microphone mute indicator
When the microphone mute indicator is on, the microphones are muted.
4 camera-status indicator
When the camera-status indicator is on, the camera is in use.
5 6 System-status indicators
The illuminated dots, one in the ThinkPad logo on the outer lid of your computer and the other on the palm
rest, show the system status of your computer:
• Blinks for three times: The computer is initially connected to power.
• On: The computer is on (in normal use).
• Blinks slowly: The computer is in sleep mode.
• Blinks fast: The computer is entering hibernation mode.
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User Guide