Keyboard / Auxiliary Input Device Checkout
Keyboard / Auxiliary Input Device Checkout
Remove the external keyboard if the internal keyboard is to be tested.
If the internal
keyboard does not work or an unexpected character appears,
make sure that the three flexible cables extending
from the keyboard are correctly seated in the connectors on
the system board.
If the keyboard cable connection is correct,
run the Keyboard Test by doing the following:
- Go to advanced diagnostic menu screen
by pressing Ctrl+A
in the basic diagnostic menu.
- Press Ctrl+K, a layout of the keyboard
appears on the screen.
- Check that when each key is pressed, the key position
on the keyboard layout on the screen changes to a black square.
NOTE:
- When a Fn key is pressed, a black square briefly appears.
- Press the Esc key to return to the diagnostic menu.
If the tests detect a keyboard problem,
do the following one at a time to correct the problem.
Do not replace a non-defective FRU.
- Reseat the three cables.
- Replace the keyboard.
- Replace the system board.
The following auxiliary input devices are supported for
this computer.
- Numeric keypad
- Mouse (PS/2 compatible)
- External keyboard (with keyboard/mouse cable)
- If any of the above devices do
not work, reseat the cable connector and repeat the failing operation.
- If the problem does not occur again, recheck the connector.
- If the problem is not corrected, replace the device, and then the
system board.
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