Using the digit keys on the remote, enter the code shown in the CodeFinder on this web page.
If you have an RCA or TCL brand TV, you can ALSO try codes:
12746, 12334, 14214, 12932, 12247, 13577, 13382, 13717, 13332, 13419, 13636, 12855, 13938, 13939, 14093, 13183