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a.power on, no disc in the tray.
b.press "SETUP" on remote control
c.press arrow "?" and move to "EXIT_SETUP". do not press any other button such like 'select'
d.press "SUBTITLE", "FB", "FF" on remote control
e.choose region or bypass for region free.
f.press select to confirm.
g.press setup to go back to normal

If you are unsuccesfull with the above code then it may be worth trying one of the resources below.

• JVC
• Panasonic
• Sony
• Kenwood
• LG
• Philips
• Pioneer
• Sanyo
• Technics
• Thomson
• Toshiba
• Yamaha