With no disk in the player press:
Setup, Vol+, Vol-, Vol+, Vol-
In the right upper corner a current region code would appear. You could switch between 1,2,3,4,5,6 or 255 using Right and Left buttons. 255 is for multi-region.
If you press Up (or Down) button you can get into Macrovision menu from here. Again, using Left or Right buttons switch between 3000 (Off) and 3001 (On) values.
DVD-player keeps these new settings even after powering off.
If you are unsuccesfull with the above code then it may be worth trying one of the resources below.
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