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
(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.
Mouse External keyboard
66 ThinkPad 390X User's Reference
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