My suspicion is that it is hardware. The reason being is that I did not occur with the HDR-2000T that I last owned, which was from one of the earlier manufacturing batches.The same issue exists on the HDR-2000T as well as the FVP-4000T. I imagine it's a hardware issue as they have never fixed it on the 2000T. Simple solution is fit a aerial splitter to give box and TV a discrete RF feed. You can then save a bit of money by turning on low power standby.