IBM MT 2632 manual Indicator Meaning

		Product overview
Indicator	Meaning
Drive in use	Green:	Data is being read from or
		written to the hard-disk drive,
		the diskette drive, or the drive
		in the Ultrabay 2000. 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 drive in use light is on. Sudden
	physical shock could cause drive errors.
Num lock	Green:	The numeric keypad on the
		keyboard is enabled. To enable
		or disable the keypad, press
		and hold the Fn key while
		pressing the NumLk key.
Caps lock	Green:	Caps Lock mode is enabled.
		To enable or disable Caps
		Lock mode, press Fn + Caps
		Lock key.
Scroll lock	Green:	Scroll Lock mode is enabled.
		Arrow keys can be used as
		screen-scroll function keys, but
		not to move the cursor. To
		enable or disable Scroll Lock
		mode, press Fn + ScrLk key.
		Not all application programs
		support this function.
Power on	Green:	This indicator stays lighted
		whenever the computer is on.
		If the power-on indicator is on
		and the standby indicator is off,
		the system is ready to use. If
		both the power-on indicator
		and the standby indicator are
		on, you can use the computer
		after it returns from the
		standby mode and the standby
		indicator goes off.

ThinkPad A21e 37