Help! This is my first DVR. I have read the instructions manual, but can't figure out what channel I need to be on to set the time, etc. I tried 2, which would be the obvious thing since it's my local public station. Also tried 3 since that is what my DVD player seems to like. I can't get the setup menu to appear at all on the screen. Yes, it is plugged in and turned on. Why can't they just say "you need to be on channel xyz" for this to work?