А так?
1.Switch on unit
2.Press "Setup" on the remote
3.Select the Lock option from the on screen setup menu
4.Press 0 x 7 times on the remote keypad
5.A message appears stating the unit is now Code free on the screen
6.Press Enter on the remote.
7.Close Setup menu and switch unit off.
8.Switch on and enjoy Multi-region DVD playing on your LG RC7300