Unit, got a few options for you, seems to depend on exactly what firmware it's got. Let me know if all 3 don't work, I'll keep digging.
Make sure there's no disc in the player.....
OPTION 1
1. Press the Repeat button on your remote control
NB: Do not confuse this with the Repeat A-B button
2. Press the buttons 5, 7, 5, 3 and 8 on your remote control, in order one at a time
3. The numbers 02 will be displayed on the top left of your onscreen display
4. Press the 1 button on your remote control for region 1, 2 for region 2, and so on, or 9 for multi-region playback
NB: The above step may be time sensitive and need to be performed quickly
5. Press the Open button on your remote control
NB: The above step may be time sensitive and need to be performed quickly
6. After 15 seconds have elapsed, power off your player and then power on your player
OPTION 2
1. Press the Repeat button on your remote control
NB: Do not confuse this with the Repeat A-B button
2. Press the buttons 3, 8, 7, 6 and 7 on your remote control, in order one at a time
3. The numbers 02 will be displayed on the top left of your onscreen display
4. Press the 1 button on your remote control for region 1, 2 for region 2, and so on, or 9 for multi-region playback
NB: The above step may be time sensitive and need to be performed quickly
5. Press the Open button on your remote control
NB: The above step may be time sensitive and need to be performed quickly
6. After 15 seconds have elapsed, power off your player and then power on your player
OPTION 3
1. Power on your player
2. Press and hold both the Play and Stop buttons on the player
3. After a short while you should be presented with a set of language options. Release the Play and Stop buttons on the player
4. You will now need to select a language option between 1 and 6
To convert this player to Multi-Region playback
1. Press the Repeat button on your remote control
2. Using your remote control enter the code below, note that you must know what Region your player is currently set to in order to know which code is appropriate
for Region 1 use 2, 9, 3, 3 and 4
for Region 2 use 3, 8, 7, 6 and 7
for Region 3 use 5, 6, 7, 3 and 2
for Region 4 use 7, 6, 8, 8 and 4
for Region 5 use 5, 3, 8, 1 and 4
for Region 6 use 2, 4, 4, 6 and 2
3. A code should be displayed on the screen indicating the current Region setting of your unit.
4. Press the 9 button on your remote control for Region free, or 1 for Region 1, 2 for Region 2 and so on.
5. Press the Open button on your player
6. Press the Standby button on your remote control