I have a 625 receiver hooked up to 2 tv's and it has been working fine for a couple years. All of a sudden last month I noticed that I can't watch the 2 tv's at the same time. The satellite will work if I have one tv turned on at a time. If I turn both on then the last one that is turned on will get a signal error. Both tv's will work if I watch only one. It seems like it isn't a cable issue then if I can get satellite on both tv's, just not simultaneously anymore. Does anyone have an idea? Thanks, Patty