Turn on with no disk inserted.
Press "Open" (same as "Stop") on the remote.
Enter 9 9 9 9 <Region code (0 for codefree)> with the remote.
Press "Open" on the remote again (I'm not sure this is necessary).
Please confirm the code worked for you by leaving a testimonial with your thoughts on how easy or hard it was. This will improve our service. Please leave a Testimonial.