On several HD channels (TWC, Discovery, FOOD network, etc) at nights I would get a blank screen and eventually the error box "complete signal loss". I wouldn't be able to change channels unless I hit menu and program guide and a different channel. Now it is also affecting the Big Ten channel in HD. If I change it to the non-HD versions, they come in ok. I have a VIP 722 and 625. I have satellites 65, 110, 119 and 128. Also those HD channels come in during the day at least from what I can tell on the weekends. I guess I am asking a DIRT member to see what options I have and if maybe I need to change to the Eastern Arc. I understand if I do that I would have to change out the 625 as well. I've tried the basic troubleshooting steps as described in the error message.