Lenovo ThinkPad T520 Hardware Maintenance Manual page 60

Table 7. Status indicators
Indicator
1
Speaker mute
2
Microphone mute
3
Wireless LAN,
Wireless WAN, or
WiMAX status
4
Bluetooth wireless
status
R
5
Device access
6
Power on
7
Serial Ultrabay
Enhanced device
status
8
Fingerprint reader
status
54
Hardware Maintenance Manual
Meaning
Orange:
Orange:
Green:
Blinking green:
Green:
Blinking green:
Green:
Note: Do not move the system while the green device access light is on. Sudden
physical shock could cause drive errors.
Green:
Green:
Blinking green:
Turn off:
Green:
Blinking green:
Blinking orange:
The speaker is on mute. To set the
speakers on mute or unmute, press the
speaker mute button.
The microphone is on mute. None of the
recording devices is available while the
microphone mute is on by default.
The wireless LAN feature (the IEEE
802.11 b/g standard, 802.11 a/b/g,
or 802.11n), wireless WAN feature, or
WiMax feature is on, and the radio link
is ready for use.
Data is being transmitted.
The Bluetooth wireless feature is on, and
the radio link is ready for use.
Data is being transmitted.
Data is being read from or written to the
hard disk drive, the diskette drive, or the
drive in the Serial Ultrabay™ Enhanced
device. When this indicator is on, do not
put the computer into sleep (standby)
mode or turn off the computer.
The computer is on and ready to use.
This indicator stays lit around the
power-on button whenever the computer
is on and is not in sleep (standby) mode.
A Serial Ultrabay Enhanced device is
installed and in use.
A Serial Ultrabay Enhanced device is in
the process of being detached.
A Serial Ultrabay Enhanced device is
ready to be attached or detached.
The fingerprint reader is ready to swipe.
The fingerprint is being authenticated or
has been authenticated.
The fingerprint could not be
authenticated.