Product overview

Status indicators

The system status indicators show the status of the computer, as follows:

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Indicator

Meaning

 

 

 

 

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.

 

 

 

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.

 

 

 

Caps lock

Green:

Caps Lock mode is enabled. To

 

 

enable or disable Caps Lock

 

 

mode, press Fn + Caps Lock key.

 

 

 

(continued)

44ThinkPad T20, T21, T22, T23 (MT 2647/2648)

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IBM T22, T21 manual Status indicators, 3 4