AMW M270 & M510
These are sometimes referred to as P270s & P510s
To change the region code:
1. Make sure there is not a DVD in the drive
2. Power on the device
3. Press Setup on the remote control
4. Hit the right arrow key three times to scroll to the "preferences" tab
5. Hit "1379" on the remote control
6. Region code will appear. Scroll up/down with arrows to cho
7. Press play