I'm away from the models right now, but I've also run across some Samsung codes that don't work on the latest TVs. Have I been using codes that are on the edge of working for some TV, and over the edge and therefore not working for other models, or has Samsung changed some codes? Sorry I can't pin this down to any particular models.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
