At our home, which has SWM, this receiver works fine. But at our summer place it suddenly won't get a signal. I've reconfigured it on the settings to change to multi switch and have a bbc installed just like I've done each time we are here and up to now it's always worked fine. Yesterday, after many failed attempts, the picture suddenly came on even tho 771 had been on the screen. Worked fine for most of the day and evening when suddenly it went out. During that time, however, the guide was not loading. Dish is SL3 and cabling is secure, no line of sight problem. Tried everything including unplugging receiver. No luck.