EXFO MAX-700 - Manual (Page 337)

Troubleshooting
MAX-700 325
Restoring Your Unit to Normal Operation
To navigate in the various windows using a keyboard (connected
to your unit):

Use up/down and left/right arrow keys.

You can also use the TAB key to go to the next group of features.

Press the ENTER key to select an item.
To restore the system partition:
1. Turn on the MAX-700.
2. While the system is displaying the boot menu (3 seconds), press
the ARROW DOWN key on your keyboard to select the Maintenance
and recovery mode.
3. Press ENTER to confirm your choice.
Note: The touchscreen becomes effective at this point.