IBM ThinkPad R32 2658 Maintenance Manual page 64

meaning of each icon:
Symbol
(1) Drive in use
(2) Numeric lock
(3) Caps lock
(4) Scroll lock
58
ThinkPad R32 Series
Color
Green
Green
Green
Green
Meaning
Data is being read from or
written to the hard disk. Do
not enter standby mode or
power off the computer
when this indicator is on.
The numeric keypad on the
keyboard is enabled. You
enable or disable the
keypad by pressing and
holding the Shift key, and
pressing the NumLk key.
For details, see the User's
Reference.
Caps Lock mode is
enabled. All alphabetic
characters (A-Z) are
entered in capital letters
without the Shift key being
pressed. You enable or
disable the Caps Lock
mode by pressing the Caps
Lock key.
Scroll Lock mode is
enabled. The Arrow keys
can be used as
screen-scroll function keys.
The cursor cannot be
moved with the Arrow
keys. Not all application
programs support this
function. You enable or
disable Scroll Lock mode by
pressing the ScrLk key.