Unplug the machine from power for five minutes.
Plug it back in, but dont turn it on.
- Press and hold down the  button on the numeric keypad, the [Energy Saver] and the [Stop] buttons
- Then, only once you are holding those buttons, power on the machine. Continue to hold down the three buttons until the Touch Screen displays several lines, goes blank and then displays lines again.
- Release the buttons. The machine will continue its normal boot up procedure to initialize the spool disk.