Starting a few weeks ago, my 722 and 722K started to display "Error Message 004 - Complete Signal Loss" when trying to access certain channels. It happens on both receivers and the channels affected are the same on both. I can restore these channels by doing a channel up - channel down, a couple of times - but it's really messing up my recordings, and cutting off some because the channels often cut out once the recording starts, or the DVR never starts because of the signal loss. I haven't experienced any loss of signal when watching these channels live, so far. Had a Tech come out today, who went up to reposition the dish because he thought the signals we on the low side. That seemed to fix the issue temporarily, but this evening things started going haywire once again. A partial list of the problem channels include - 110; 131; 132; 133; 301; 305; 307; 313; 314; 345; 346; 350 - but there are a lot more. I have sling adapters connected to both receivers and the DVR's are plugged into wall outlets to access the internet via Home Powerline connection using a Slinglink Turbo, which is plugged into my router. I wondered if that had something to do with it, but I've had them connected long before this problem started to occur. I do not have the OTA module or access any OTA channels, all my local channels are provided through DISH. Hope someone can give me some guidance into a fix on this - I have 60 days to resolve the issue before the warranty on the service call runs out. Thanks.