Why does my IMAC super drive recognize data dvd's but not movies?

My 27" Intel Imac recently stopped playing dvd movies. The drive still recognizes data disks but not movies. When I insert a dvd movie the drive makes noises for 30 seconds then eject the disk.

Have you changed region codes on movies? It will only change for a total of 5 codes.
Regards,
Captfred

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Why does my IMAC super drive recognize data dvd's but not movies?

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