Toshiba TECRA A11 Series Maintenance Manual page 247

Tests and Diagnostics
The keyboard which can be tested is two kinds, "US Keyboard A4 Mode" and "US Keyboard
A4 Mode+10Key Mode."
When you test a keyboard with a ten key, choose "US Keyboard A4 Mode+10Key Mode" by
the combo box of the keyboard layout upper left stage.
3-138 [CONFIDENTIAL] TECRA A11/S11/P11/Satellite Pro S500 Series Maintenance Manual (960-784)