IBM ThinkPad X21 2660 Hardware Maintenance Manual page 40

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Indicator Meaning
1 Battery
Green:The battery is fully charged.
Blinking green: The battery has enough
power to operate but is charging.
Orange: The battery power is low. The
battery is charging.
Blinking orange: The battery needs
charging.
2 Standby
Green:The computer is in standby mode.
status
Blinking green: The computer is
entering standby mode or hibernation
mode, or is resuming normal operation.
3 Drive in
Green:Data is read from or written to the
use hard disk drive, diskette drive, or drive in
the Ultrabay 2000.
4 Num lock
Green:The numeric keypad on the key-
board is enabled.
5 Caps lock
Green:Caps Lock mode is enabled.
6 Scroll lock
Green:Arrow keys can be used as
screen-scroll function keys.
7 Power on
Green:The power is on.
The following table shows the test for each FRU.
FRU Applicable test
System board 1. Diagnostics --> CPU/Coprocessor
2. Diagnostics --> Systemboard
Power Diagnostics --> Other Devices --> IBM
AC Adapter, IBM Battery
LCD unit 1. Diagnostics --> Video Adapter
2. Interactive Tests --> Video
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ThinkPad X21