I am new sub to D. I was with E for the last 3 years.. My install was last Saturday. Everything was working great until this morning! My local channels drop out this morning. I have call D customer service and they say everything looks good on their end. They say it mght be my multi switch. All other HD channels are fine. I have 3 HD receivers and 1 HD DVR. Any suggestions? I have already trying a new setup on all systems