Here is the recipe:

Note: it can be done without using any TV, but it is easier to see what you are doing if a TV is connected.


Unit in stand-by- No disc in tray

Press and hold at the same time the following buttons on the front panel of the C717: “Source” and “Tuner mode” and “Power”.

Hold all 3 buttons pressed until the unit turns on and the display indicates “Service mode”

Now on the remote control press “0” and then “Prog” Set unit in Stand-by- it is now region free (region 0)