I have a Directv system that consist of (1)HR44-700 (4) H25-100 (3) C41-700. One morning while watching one of the C41-700's the picture started to freeze and tile. Now none of the C41's work. They all come up cable not connected after a reset. All these units use coax (Not wireless). If I go to the HR44-700 and hit add client it gives a 4 digit code but that does not matter, C41's still say no connection. I have unplugged the SWM power inseter, HR44-700 and all C41's. I can move my H25"s into room that the C41's do not work and they work fine. Moving C41's into other rooms does not change, still come up no connection. I spent hours on the phone with Directv, they are shipping me three C41's. I know that will not help, what are the odds three boxes failed? This has me stumped.