In my master bedroom I have a Harmony 880 remote that had controlled the TV, HR24 DirecTV receiver, a Sony DVD player, and a Roku3. A couple weeks ago it suddenly stopped working. Completely. The battery was only a couple months old, so I know that wasn't the problem, especially since the battery worked in other Harmony remotes. I tried troubleshooting things, but I was unsuccessful. I ordered a replacement one from ebay, but THAT one didn't work. At all. So I then purchased a new one off ebay, but THAT one was also totally inoperative. Nothing on the remote works: I can't turn the TV on/off; can't change the volume; can't operate the HR24; can't control the Roku3; can't control the DVD player--nothing. I've updated the Harmony software, but that doesn't work. For the life of me, I can't figure out why 3 different Harmony 880s all do not work.