I'm trying to change the region code on my LG 550 blu ray...instead of region 0-9 it has letters do anyone knows which letters are for multiregion?

Blu-Ray discs have letters:
http://www.amazon.com/gp/help/customer/display.html?nodeId=200492990
About DVD Region Specifications

Doesn't work. Press 0 four times did absolutely nothing.

This WEB site has a YTube video that assist in setting your Blu-Ray for Region Free.
http://www.youtube.com/watch?v=gCaEQuS1aSY

1. Turn on the player (without disc inserted)
2. Open the disc tray
3. (Press PAUSE)
4. Press 0, 0, 0, (0)
5. Enter region (1-6; 0=region free)
6. (Press PAUSE)
7. Turn it off

Have you changed the Regional Code of the DVD changer? Changing of Regional Code of the Changer is permitted for 5 times. To view movies of different region code, some people change it. Suppose you or someone have viewed a movie of different region movie after changing the region code & now you are trying to view a DVD of your region. In this case you will have to change the region code to your region. Changing of region code is available through the setup of the Changer.

-sonsunny

This model is already Region Free for DVDs but only Region A (in most cases) for Blu Rays and can't be changed. You can buy a version of this which is sometimes called BDP550 which is Region Free for DVDs and Blu Rays.

try

1. Turn on the player (without disc inserted)
2. Open the disc tray
3. (Press PAUSE)
4. Press 0, 0, 0, (0)
5. Enter region (1-6; 0=region free)
6. (Press PAUSE)
7. Turn it off

Hi.

Try the solution below:

"To set DVD Region to "any", download file "6000.zip" (often also called "LG6000.zip") from this link:

http://www.multi-region.net/_media/6000.zip

Save the file and then unzip and extract it to your hard drive. Now burn the subdirectory RMTM0000 and its contents (not the text file) onto a CD-ROM (ISO format, "closed" CD-ROM). Insert CD-ROM into the LG BD 370 P player, and when the Region Management System screen is displayed, set the Region Code to "0" using your remote. Once done, press "PAUSE" on you remote to save, and you're done!"


From : http://www.videohelp.com/dvdhacks/lg-bd370/10016

try this; its for a different model but looks simalar and ay work.

1. Turn power on
2. Open tray
3. Press 0, 0, 0
4. Change the region (0 = multi-region)
5. Press PAUSE