Toshiba Satellite Maintenance Manual page 100

pressed, the corresponding key on the screen changes to black as shown below.
It will indicate whether the sub test is passed or failed after the question.
NOTE: The "Fn" key cannot be tested in the keyboard test.
To determine whether the "Fn" key is working correctly, press "Fn+F6 " or "Fn+F7
" keys to check if LCD display brightness change gradually.
US Keyboard
Japan keyboard
3. Tests and Diagnostics
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