IBM 560x User Guide
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Troubleshooting
Problem
Action
All or some keys on the
external keyboard do not
work.
external keyboard do not
work.
To use an external keyboard, you need to attach the keyboard/mouse connector
to the computer. Verify that:
to the computer. Verify that:
The keyboard/mouse connector is correctly connected to the computer.
The keyboard connector is connected to the correct side of the
keyboard/mouse connector.
If the preceding items are correct, disconnect the keyboard/mouse connector
from the computer and verify that the operation of the system keyboard is
correct. If the system keyboard works, have the keyboard/mouse connector or
the external keyboard serviced.
from the computer and verify that the operation of the system keyboard is
correct. If the system keyboard works, have the keyboard/mouse connector or
the external keyboard serviced.
A number appears when
you type an alphabetic
character.
you type an alphabetic
character.
The numeric lock function is on. To disable it, press and hold Shift; then press
NumLk.
NumLk.
Chapter 8. Solving Computer Problems
161