I just found out how to program my 232V TV with Comcast. You will need the DVR-3 remote to do this. There are three codes to try, but I found 11331 worked on my particular model. The other codes are 11144,11240. Turn TV on, aim the remote at your cable box, hit tv, then hold setup button until TV button blinks, then put in the code and the cable button will blink. You should be good to go. If the power does not
shut off when you hit the power button, push cable button twice and then power and it should be okay. Mine works great now.