Out of my 7 HD DVR's, this one HR21 has been acting strangely for several months. At first it started reacting extremely slowly to commands (for example taking 10 minutes to register a command). Then it would not playback or record properly. I diagnosed it by running all the internal tests and it passed them all with flying colors. I put it in another room just to make sure it wasn't somehow related to where it was hooked up but it's still the same. As an additional oddity, I had it hooked up to our whole home briefly and you could see its playlist ont he other DVR's. However when trying to play something it would come back with a message saying something about no packet was sent from the box. So I'm trying to see if there's any way to save it since my wife had a lot of recordings on it that she was hoping to save. Otherwise I'll just have to get it replaced.