Some TV's the on-TV buttons are not obvious. For example on a Samsung model, the activating button is underneath the Samsung logo, and u have to press it x times or hold it for a few seconds blah-blah. Have u consulted the manual? On my 8 years old Samsung again, the buttons are TOUCH buttons, not physical buttons on the bezel and they only light up when I pass my fingers on them. Manual is Godspell.