We lost the codes for our Universal Remote Control. The battery compartment has the letters/numbers: RCR450C 3701P

What kind of remote is it? if it is rca you can push the device your going to program it to such as the tv then hold the power button until it stays lit oh, by the way the tv should be on while you do this,now that the power button is lit keep pushing it until the tv turns off as soon as it turns off you push the stop button on the remote like you were going to stop a dvd.Now press power again and your tv should turn on,repeat these steps for all your other devices and your done with no codes,hope you have an rca remote and if you dont maybe they have this no code feature in other brands,good luck