I DON'T KNOW. ARE BATTERIES IN PROPERLY ?
IF LINE OF SIGHT REQUIRED, IS ANYTHING BLOCKING TVs SENSOR ? PERHAPS YOU CAN REPROGRAM
YOUR REMOTE - SEE OWNER's MANUAL. YOU MAY HAVE WARRANTY STILL IN EFFECT. CALL RETAILER OR SERVICE FOR TCL/TV TO FIND OUT DETAILS. ALSO
SEE LINK FOR PURCHASING NEW REMOTE.
<https://www.remotes.com/SearchResults.asp?Search=TCL>
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