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Indicator Meaning
3 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.
4 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.
5 Caps lock Green: Caps Lock mode is enabled.
To enable or disable Caps
Lock mode, press Fn + Caps
Lock key.
6 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.
7 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.
Product overview
ThinkPad A21e 37