Remove the battery cover on the back of the remote and look for the model number ("RCR8153603P" for instance) Consult list of TV codes for your model via: http://support.rcaaccessories.com/index.html...
1. Turn on TV
2. Press and hold CODE SEARCH until light stays lit, release
3. Press TV button
4. Press POWER repeatedly (slowly) until TV turns off
5. Press ENTER
(repeat for VCR & Cable)