2 8 System status indicators
The indicator in the ThinkPad logo on the computer lid and the indicator in the power button 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 mode).
• Off: The computer is off or in hibernation mode.
• Blinks quickly: The computer is entering sleep or hibernation mode.
• Blinks slowly: The computer is in sleep mode.
3 Fingerprint reader indicator
This indicator shows the status of fingerprint reader.
•
1 Off: The fingerprint reader is not ready for tapping.
•
2 White: The fingerprint reader is ready for tapping.
•
3 Amber, blinking: The fingerprint cannot be authenticated.
4 Caps Lock indicator
When this indicator is on, you can type uppercase letters by directly pressing the letter keys.
5 Fn Lock indicator
This indicator shows the status of Fn Lock function. For more information, see Chapter 6 “Using the special
keys” on page 45.
6 Speaker-mute indicator
When this indicator is on, the speakers are muted.
7 Microphone-mute indicator
When this indicator is on, the microphones are muted.
9 ac power status indicator
This indicator shows the ac power and charging status of the computer.
• White: connected to ac power (battery power 90%–100%)
• Amber: connected to ac power (battery power 0%–90%)
• Off: not connected to ac power
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T480 Hardware Maintenance Manual
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