IBM L40 SX Quick Reference page 41

Icon Meaning
Appears when the computer has entered Suspend Mode. This icon
stays on as long as the computer is in Suspend Mode.
See "Suspend and Resume Modes" on page 40 for more information
about Suspend Mode.
Alternately turns on and off each time the Scroll Lock key is pressed.
Alternately turns on and off each time the Caps Lock key is pressed.
Caps lock specifies a certain character set based on the keyboard
language used. Characters a through z (English) are converted to A
through Z.
Alternately turns on and off each time the Num Lock key is pressed.
Numeric lock fixes the upshifted character selection on the numeric
keypad.
Appears when the drive is reading from or writing data to a diskette.
Appears when the drive is reading data from or writing data to the fixed
disk.
Appears when the temperature is outside the operating range of the
computer, between 5°C and 35"C (41°F and 95°F); accompanied by
one long and one short beeps. Power off and do not use until the
temperature of the computer is within the operating range.
This icon disappears when the temperature of the computer is within
the operating range.
Appears when the humidity is outside the operating range of the
computer, between 5% and 95%; accompanied by one long and one
short beeps.
This icon disappears when the humidity returns to acceptable range.
Appears indicating that the speaker sounded.
This icon blinks until any key input or mouse operation is performed.
Appears when the communication link is established.
Introducing the IBM Personal System/2 Model L40 SX 29