Lenovo ThinkPad i Series 1124 ThinkPad 240 User's Reference that shipped with - Page 67

Attaching an external keyboard and mouse, To attach the external keyboard, turn off the computer

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Attaching an external mouse, keypad or keyboard Attaching an external keyboard and mouse Mouse External keyboard You can connect an external keyboard to your computer either directly through the external input-device connector or through the keyboard/mouse cable (available separately as an option). When the external keyboard is attached, the following keys are not available: Numeric keypad on the computer keyboard External numeric keypad Instead, use the numeric keypad on the external keyboard. To attach the external keyboard, turn off the computer, attach the keyboard to the keyboard connector of the keyboard/mouse cable 1 , and then attach the keyboard/mouse cable to the computer 2 . You can attach a mouse to the mouse connector of the keyboard/mouse cable. Chapter 2. Extending the features of your computer 55

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Attaching an external mouse, keypad or keyboard
Attaching an external keyboard and mouse
You can connect an external keyboard to your computer either
directly through the external input-device connector or through the
keyboard/mouse cable (available separately as an option).
When the external keyboard is attached, the following keys are not
available:
±
Numeric keypad on the computer keyboard
±
External numeric keypad
Instead, use the numeric keypad on the external keyboard.
To attach the external keyboard, turn off the computer, attach the
keyboard to the keyboard connector of the keyboard/mouse cable
±1²
, and then attach the keyboard/mouse cable to the computer
±2²
.
You can attach a mouse to the mouse connector of the
keyboard/mouse cable.
Mouse
External keyboard
Chapter 2.
Extending the features of your computer
55