Filo said to go to the "cable box menu" (ie, the menu on the cable box itself, not the Replay IR blaster menu). Reading between the lines, I'm guessing autotune allows you to type a number and the channel will automatically tune without you needing to press ENTER, so if you turn it off, you do need to press enter, and I assume the 0476C version of the setup code includes an enter button (but I m just guessing).