Hello, I have read through this entire thread but am a little nervous to try anything. I'm not sure if I am having the same specific problems that are here but seem like this is on the right track.
We just bought a new Samsung TV last night. After we got everything set up, the cable remote worked a few times. It would bring up the guide but get stuck and not move at all. I told my husband, "it's almost like it's to much for the TV to handle", it would freeze, we would turn the TV off and then it would work a few times and then freeze again.
Today the remote does not work at all with the TV on. If I turn the TV off, I can change channels (and see the change on the box) and then if I turn the TV back on, it is on the new channel. Of course there is no way for me to tell if the other buttons are working with the TV off.
We have a Motorola HDMI HD Dual Tuner DVR DCH3416 Box. We have a silver Comcast remote with a red OK/Select button.