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Problems with the Keyboard
Observation
Action
Nothing happens when
you press keys.
1.
Check whether the key is in
L O C K
position. If so, turn it to
RUN
position.
2.
Press
Caps Lock, Num Lock
and
Scoll Lock
to check if they light.
If not, turn the power off and check
that the keyboard cable is properly
connected to the system unit.
If the error persists, service is
needed.
Program error
suspected.
1.
Try pressing
Ctrl-Break.
2.
Try resetting the system by
pressing
Ctrl-Alt-Delete.
If nothing happens, turn the power off
and then on again.
Some keys produce
wrong characters, or
some keys produce no
characters.
Run the keyboard test in the Mainte-
nance program. See Using Mainte-
nance Program later in this chapter.
4-6
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