For what it is worth..... It seems to be every day the U.S. channels just go dark at or around the 4 PM EST. I have noticed this for awhile now. Then within 15 minutes or so they all come back. WGN News still works along with NewsMax and the British channels but the US channels go dark when it happens. Like I said around 4 pm est is when I notice it. I just watch something else during that time since it don't seem to last long. I just consider that "Normal".