EXFO FTB-1 - Manual (Page 212)

Troubleshooting
202 FTB-1
Restoring Your Unit to Normal Operation
To navigate in the various windows using the unit’s keypad:

Use up/down and left/right arrows.

You can also press to go to the next group of features (equivalent
of the TAB key).

Press to select an item (equivalent of the ENTER key).
To restore the system partition:
1. Turn on the FTB-1.
2. While the system is displaying the boot menu (3 seconds), press
the down arrow from the unit’s keypad to select the Maintenance and
recovery mode.
OR
Press the ARROW DOWN key on the keyboard (if you have connected
one).
3. Press from the unit’s keypad or ENTER on your keyboard to
confirm your choice.
Note: The touchscreen becomes effective at this point.