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:
Please see the LEGAL - Trademark notice.
Feel free - send a for any BUG on this page found - Thank you.