У меня вот это сработало:
1) Turn on the player with no disc in the tray
Wait till the unit is at the Samsung logo screen.
2) Open then close the tray, wait to see the No-Disc Message in the top Left Corner
3) Now press the REPEAT button on the remote, followed by a five digit code.
In this case Repeat 76884
Now it to me about 20 tries to get this to work, It needed to be done without delay.
So if you don’t get it to work straight away don’t loose heart.
4) When it works a 4 will appear in the top left corner
5) Press 9 to make it regionless.
6) Press Eject to OPEN to open the disc tray.
7) Press Eject to CLOSE to close the disc tray.
8) Power the unit off
9) Now power the unit on again, it should now read all regions of DVD Disc.
From other threads I got the follow list of region codes.
R1 - 29334
R2 - 57538
R3 - 56732
R4 - 76884
R5 - 53814
R6 - 24462