1. Ensure disc tray is empty.
2. Press "Repeat" (this is on the bottom right of the remote control and shouldn't be confused with Repeat A/B which is on the left) on the R/C then enter 5,7,5,3,8
3. The number "2" (current region code) should appear in the top left of the screen.
4. Quickly press the number "9" button on the R/C, for "multi region".
6. Wait 20 seconds, then power off, then on again.
If you are unsuccesfull with the above code then it may be worth trying one of the resources below.
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