Emerson's are NOTORIOUS for not working with our remotes. I have had a few to work if you try this.
Make sure the TV is on press the TV button on your remote until all the top buttons lite up press the main power button press the channel up button slowly, about once per second until the tv turns off. (if you accidentally go past the code, sometimes you can press the channel down button to go back, but if not you have to start over.) press the # button and you are done.