Good guys get into the menu I think, to unlock all regions, so I can not go further because I do not know the sequences of regions.
Try to you, because nowhere else found it.
With Blu-ray BD550 off, hold the POWER AND STOP together for a few seconds the display will show some numbers, here there appeared 01,133 that will just push PLAY start browsing for a few numbers in the sequence which do not understand right to unlock.
THIS CAME HERE TO ORDER NUMBERS
TO NAVIGATE Thereafter CONTROL AND PRESS PLAY TO CHANGE THE NUMBERS PRESS THE KEYS <<>> THE UNIT BD
AFTER CHANGING THE NUMBERS TO END PUSH POWER