CANT CHANGE CHANNEL FROM 03 TO 03-1,03-4 AND SO ON.

Do a hard reset to this set and check. Unplug the TV from AC mains wall socket, and re-plug it back after 5 minutes or so, This must make it a hard reset. If it to not help you, seek tech support. If you wish to get more details, surf the following link. There are over two thousand and four hundred posts. All are related to television and other domestic electronic equipment service help. You can get a solution there. Type in the brand name to your device to its search box, can be located at the top right of the display window. It will make search easy. More than Nine Lakh viewers cannot be wrong.http://electronicshelponline.blogspot.com/