Harman Kardon DVD-10 region-free hack
Also works on: DVD-20, DVD-25, DVD-50
Turn the player on
Wait until 'No disc' is displayed
Press the buttons 3 1 4 1 5 9 2 on the Remote Control
The press 1 for Region 1, 2 for Region 2, 3 for Region 3, or 4 for Region 4 etc.
The display should now show 'Power On'
Didn't work, or found a better way? Send us your version.