IBM ThinkPad X20 Hardware Maintenance Manual page 49

2 Standby status Green:The computer is in standby mode.
3 Bluetooth(X23,
X24 Bluetooth
Model Only)
4 Bluetooth
power button(X23,
X24 Bluetooth
Model Only)
5 Drive in use
6 Num lock
7 Caps lock
8 Scroll lock
9 Power on
The following table shows the test for each FRU.
FRU
System board
Power
LCD unit
Chapter 3. ThinkPad X20, X21, X22, X23, X24
Blinking green: The computer is entering
standby mode or hibernation mode, or is
resuming normal operation.
Green:The Integrated Bluetooth features are
on.
Blinking green:The Integrated Bluetooth
features are functioning.
Press this button to turn the IBM Integrated
Bluetooth on and off.
Green:Data is read from or written to the
hard disk drive, diskette drive, or drive in the
Ultrabay 2000.
Green:The numeric keypad on the keyboard
is enabled.
Green:Caps Lock mode is enabled.
Green:Arrow keys can be used as
screen-scroll function keys.
Green:The power is on.
Applicable test
1. Diagnostics --> CPU/Coprocessor
2. Diagnostics --> Systemboard
Diagnostics --> Other Devices --> IBM AC
Adapter, IBM Battery
1. Diagnostics --> Video Adapter
2. Interactive Tests --> Video
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