Lenovo 2808DKU, 28155YU, 28155XU manual Status indicators, Indicator, Bluetooth

Table 8. Status indicators

Indicator	Meaning
Speaker mute	Orange:
	The speaker is on mute. To set the speakers on mute or
	unmute, press the speaker mute button.
Microphone	Orange:
mute	The microphone is on mute. None of the recording
	devices is available while the microphone mute is on by
	default.
Wireless LAN,	Green: The wireless LAN feature (the IEEE 802.11 b/g standard,
Wireless WAN,	802.11 a/b/g, or 802.11n), wireless WAN feature, or
or WiMAX	WiMax feature is on, and the radio link is ready for use.
status	Blinking green:
	Data is being transmitted.
Bluetooth	Green: The Bluetooth wireless feature or wireless USB feature is
wireless or	on, and the radio link is ready for use.
Wireless USB	Blinking green:
status	Data is being transmitted.
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.
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.
Ultrabay Slim	Green: An Ultrabay Slim Media Bay device is installed and in
Media Bay	use.
device status	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.
Fingerprint	Green: The fingerprint reader is ready to swipe.
reader status	Blinking green:
	The fingerprint is being authenticated or has been
	authenticated.
	Blinking orange:
	The fingerprint could not be authenticated.
Caps lock	Green: Caps Lock mode is enabled. To enable or disable Caps
	Lock mode, press the Caps Lock key.
Sleep (standby	Green: The computer is in sleep (standby) mode.
for Windows	Blinking green:
XP) status	The computer is entering sleep (standby) mode or
	hibernation mode, or is resuming normal operation.

72ThinkPad T400s Hardware Maintenance Manual