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Table 8. Status indicators
Indicator Meaning
1 Speaker mute
Orange:
The speaker is on mute. To set the speakers on mute or
unmute, press the speaker mute button.
2 Microphone
mute
Orange:
The microphone is on mute. None of the recording
devices is available while the microphone mute is on by
default.
3 Wireless LAN,
Wireless WAN,
or WiMAX
status
Green: 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.
Blinking green:
Data is being transmitted.
4 Bluetooth
wireless or
Wireless USB
status
Green: The Bluetooth wireless feature or wireless USB feature is
on, and the radio link is ready for use.
Blinking green:
Data is being transmitted.
5 Device access
Green: Data is being read from or written to the hard disk
drive, the diskette drive, or the drive in the Ultrabay
Slim Media Bay device. When this indicator is on, do
not put the computer into standby mode or turn off the
computer.
Note: Do not move the system while the green device access
light is on. Sudden physical shock could cause drive errors.
6 Power on
Green: 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 standby mode.
7 Ultrabay Slim
Media Bay
device status
Green: An Ultrabay Slim Media Bay device is installed and in
use.
Blinking green:
An Ultrabay Slim Media Bay device is in the process of
being detached.
Turn off:
An Ultrabay Slim Media Bay device is ready to be
attached or detached.
8 Fingerprint
reader status
Green: The fingerprint reader is ready to swipe.
Blinking green:
The fingerprint is being authenticated or has been
authenticated.
Blinking orange:
The fingerprint could not be authenticated.
9 Caps lock
Green: Caps Lock mode is enabled. To enable or disable Caps
Lock mode, press the Caps Lock key.
10 Sleep (standby
for Windows
XP) status
Green: The computer is in sleep (standby) mode.
Blinking green:
The computer is entering sleep (standby) mode or
hibernation mode, or is resuming normal operation.
72 ThinkPad T400s Hardware Maintenance Manual