First, you need to connect up a monitor and keyboard to the unit. With these connected you should see the same display on the monitor as on the LCD display.
Next press "Alt + F2"
The Default username is "root" and the Default passowrd is "galleon"
Press "q" followed by enter to break out of the menu system.
Then enter these commands each line at a time, pressing enter after each line:
mount -t vfat -o rw /dev/sda1 /mnt
*If the first command fails and says that the device is not connected, try replacing "sda1" with "hda1"
Once this is done and the unit has rebooted, try to connect to the unit using a web browser. The Default username is "admin" and the Default password is "password"