So I have been reading some responses to other problems people have had with the 775 error but none of them seem to fit my exact problem so I figured I would post it and see what the responses might be. Last night my wife asked me if I could move our HD Receiver from the kitchen to the bedroom TV. I unplugged all the wiring went into the basement found the coax and the connection in the Power Inserter and unplugged the kitchen coax and plugged in the master bedroom coax. Super simple.... so I thought. After hooking everything up in the bedroom I keep getting the 775 Problem connecting with sat. Now I have 2 boxes I have a HR21-100 HD-DVR in the living room. This box still works perfectly fine has no connection issues all features still work. I am curious where my problem could be and if there is a way to test the coax running to the bedroom without having to have a tech sent out? I am good enough with my hands that I can do whatever needs to be done the problem is I don't know what needs to be done. Thanks in advance and if I left anything out let me know.