My samsung BluRay Player BD D5700 will play DVD's but will not play BluRay DVD's.

SOURCE: DVD playback distorted in Samsung BD-P1600 Blu-ray Player

I called Samsung with the same issue. After verifying the latest firmware was installed, they suggested I send the unit in for service. I expect it back sometime this week, and DVD playback will be the first thing I test.

SOURCE: my bluray player is a samsung bd-p1500 and

I have the same problem, and the Blu ray disc is playing fine in another Blu ray player: Sony.

SOURCE: I own a Samsung BD

I had this problem after the Decembe 2010 firmware upgrade. Today I went to the samsung website and downloaded the RUF file for USB. You must also downloand the instructions for installing the upgrade again. It will probably take 2 installs. Now all works great. Problem solved/.
tom

SOURCE: I have a samsung BD

Providing that you have a legal DVD player that is meant to play discs in this country and that you have bought a legal disc (not an illegal bootleg copy) you might need to do a firmware update on player.

If player has internet connectivity you can do it directly on player - it should be a menu prompt to update firmware

if no internet connection is available on player you will need to contact Samsung and have them send firmware update to you on a disc and load it that way

If either disc or player is a bootleg or grey/black market purchase than that is the issue

Players will only play discs from the region they were made to work in

USA is region 1

good luck

SOURCE: region code for Samsung BD-E6100

Try this code I have got it with this code may be you will also get yourthe code is: BD-E6100/XU.Perfectly I don't know whether it is for all regions or not but try this.
Performance Chip