Just hooked up a new HR21-DVR to switch out my HD20 hooked it up and not recieving all my HD channels and the C sat has very little or no signal. I'm replacing the cables tonight and see if that helps. TS is making a service call tomorrow unless the cables help. Sorry if this is a repeated post a newbie here.Any suggestions of what else I can do. The H20 was working perfect and I moved it to another room and it still works perfect and my other ones also.