Status indicators - ThinkPad A21e (2628), A21m/p, A22m/p
The system LED status indicators show the current computer status in different colors as listed in the table below:
LED indicator color
LED indicator meaning
This indicator displays green when the battery is in use and the battery has enough power. It also displays green when the AC adapter has charged the battery completely.
This indicator blinks when the battery is being charged yet still has enough power to operate. At regular intervals, the indicator light turns off briefly.
This indicator displays orange when the battery is being charged, but the battery power is still low.
The battery needs charging.
The computer is in standby mode.
The computer is entering standby mode or hibernation mode, or is resuming normal operation.
Drive in use
Data is read from or written to the hard-disk drive, the diskette drive, or the drive in the Ultrabay 2000.
The numeric keypad on the keyboard is enabled. To enable or disable the keypad, press and hold the Shift key, and then press the NumLk (ScrLk) key.
Caps Lock mode is enabled. You can enter all alphabetic characters (A-Z) in uppercase without pressing the Shift key. To enable or disable Caps Lock mode, press the Caps Lock key.
Scroll Lock mode is enabled. The Arrow keys can be used as screen-scroll function keys. The cursor cannot be moved with the Arrow keys. Not all application programs support this function. To enable or disable Scroll Lock mode, press the ScrLk key.
The computer is on and ready to use. This indicator stays lighted even when the computer is in standby mode.