I went on the roof last evening with the help of my father-in-law. He made sure everything was tight then I did a re-scan and everything was good again. I still can't get NBC for some reason but I couldn't get it before either. I just moved to another part of the city so I was hoping I would get better reception but I lost NBC and MeTV (which only came in sometimes at my old place). I do get ION in the evenings now though but there isn't much on those channels.