My Samsung dvd player is suppose to be multi regional. I have entered the code and it used to work fine but it now plays my american region dvd's in black and white.
What I am saying is very generic, and does not apply to any one type of DVD player.
Apparently, for many models the region codes can only be changed a number of times, and then the unit locks. This is how most of these units are designed. It is probably locked to the last code used. The user instructions will normaly give an indication to the number of changes allowed.
When the unit is locked, it cannot be changed. The locked code is burned in to the EPROM of the DVD player.
You need a true multi region DVD machine. This would be a player that will not ever lock. There are some on the market. Carefully research this spec before making your purchase.
There are some models that will lock, but it is possible to patch them to not lock. The patching has to be done before the unit does get locked. You would have to explore the net to find this information.
Jerry G.
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