I am trying to figure out whether I have a problem with my HR24 or whether something else is going on. Here is what I am observing. I am tuned in to a particular channel. Occasionally I will then see a quick dark screen, as if the channel is being changed, and then the channel I was tuned to re-appears. It is behaving like I changed the channel, but the remote has been sitting untouched on the table. Any thoughts? Something going bad with my HR24?