If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable extending from the keyboard is correctly seated in the connector on the system board. If the keyboard cable is connected correctly, run the Keyboard Test.
Note: Disconnect any external keyboards before testing the built-in keyboard.
If the tests detect a keyboard problem, do the following one at a time to correct the problem.
1 Reconnect the keyboard cable to the system board.
2 Replace the keyboard.
3 Replace the system board.
If any of these devices do not work, reconnect the cable connector and repeat the failing operation.
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