My brother-in-law experiences signal loss for only Detroit DMA local channels during the day, clearing up and producing a rock-solid picture after about 8:30 to 9pm. HBO, CNN, etc. is available 24 hrs/day. His service address is in the Detroit metro area, however, the intermittent signal loss occurs at his lake house in a rural area in zip code 48748. He owns a DirecTv SD system with only one TV connected to the dish. Other threads report a signal LOSS with locals at mid-evening. His signal for locals APPEAR only upon mid-evening and later. I am not sure of which receiver he has (I have a DishNetwork system). During the day he gets a blank screen when tuned to the locals, WITHOUT any sort of message. I realize that he is most likely is at the very fringe of the Detroit DMA footprint, but that does not explain why the signal is dependable and only watchable after about 9pm. I'm thinking that the sun is a noise generator of sorts, and may contribute enough marginally to prevent reception of a daytime local signal. I don't know if the locals become watchable later in the evening in the summer months. Any suggestions to prevent this problem would be appreciated.