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Indicator Meaning
4 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.
5 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.
6 Battery Green: The battery is fully charged.
Blinking green:
The battery has enough power to
operate, but is being charged.
Orange: The battery power is low. The
battery needs to be charged.
Blinking orange:
The battery needs to be charged
when the indicator starts blinking
orange, the computer beeps three
times.
7 Standby
status
Green: The computer is in standby mode.
Blinking green:
The computer is entering standby
mode or hibernation mode, or is
resuming normal operation. This
indicator does not blink in Windows
2000, Windows Me, and Windows
XP.
8 Ultrabay
status
Green: An Ultrabay 2000 device is
installed and in use.
Blinking green:
An Ultrabay 2000 device is in the
process of being detached.
Turn off: An Ultrabay 2000 device is ready
to be attached or detached.
Note: If you are using Windows 2000 or
Windows XP, the Ultrabay status indicator
does not blink while an Ultrabay 2000 device
is being detached. Instead, a message box
pops up when the process is completed; then
the indicator turns off.
Product overview
ThinkPad T20, T21, T22 and T23 series 45