Toshiba PORTEGE Z830 Satellite Z830 Maintenance Manual page 241

Tests and Diagnostics
1) If the press of a key is recognized correctly, the object key on a display will be eliminated.
2) When redoing a keyboard test, the "Refresh" button arranged at the screen lower left is
pressed. Next, it returns to the state immediately after starting.
Note: The check of the "FN" key should press "FN" and "F3" simultaneously. It does not
react, even if it presses only the "FN" key.
[CONFIDENTIAL] 3-137
PORTEGE Z830 Satellite Z830 Series Maintenance Manual (960-883)