You'll have to get a new remote for it - - - contact Samsung or if they can't help get one of those third-party remotes that can be programmed from a list of TV codes that are included with the instructions (eg a "one-for-all" remote).
You'll have to get a new remote for it - - - contact Samsung or if they can't help get one of those third-party remotes that can be programmed from a list of TV codes that are included with the instructions (eg a "one-for-all" remote).