This problem is for a TIVO Series 2: I have tried all of the listed codes for my Toshiba 30" TV. One of them will allow me to turn the TV on or off just fine, but no MUTE button. A couple of others will allow me to use the MUTE button, but when you try to power on or off, it is like you are hitting the power button TWICE (if you started with the TV off, you end up with it off). I have been very careful to make sure that I am only pressing the power button once. I have tried the auto-program routine, but get the same results. Any help would be greatly appreciated.