If it is its original remote control, without any adjustments, it should work with it. Check the remote control for its infrared emission. Check it with fresh batteries. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
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