I just got my Hr20 last night. Everything is hooked up and working(sorta) I have 2 questions. Several times on ESPN(HD) today, the screen flashes black for about 1 second. I don't lose sound, so I don't thinks it's a signal issue. Is this a known problem? How should I troubleshoot it. Twice this morning I got a (searching for sat signal 771?) or something like that, on 1 of my local channels. It came right back. We aren't facing any inclement weather or anything. Again how should I troubleshoot? Thanks for your help.