Keyboard or Auxiliary Input Device Checkout (TP 560Z - 2640)

Keyboard or Auxiliary Input Device Checkout

If the internal keyboard does not work or an unexpected character appears, make sure that the flexible keyboard cable is firmly connected to the system board. If it is firmly connected, then run the Keyboard Test. If an external keyboard is connected, remove it before running the Keyboard Test for the internal keyboard. See 'Running the Diagnostics' for details.

NOTE: When the Fn key is pressed, a black square briefly appears. If the Keyboard Test detects a keyboard problem, do the following one at a time to correct the problem. Do not replace a nondefective FRU:

The following auxiliary input devices are supported for this computer:

If any of these devices do not work, reseat the cable connector and repeat the failing operation.

If the problem does not recur, the problem may have been in the connector. Recheck the connector.
If the problem is not corrected, replace the device and then the system board.

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