After moving my Uniden UST-4400 Super receiver I inadvertently (stupidly) connected the C-band LNB to ther18V output on the back of the unit. Now I can't seem to get any signals. Did I kill the LNB? We have had a lot of snow lately, it's finally melted off of my BUD. But still nothing. I normally only use the system to watch PBS on Saturday afternoons on G4 16 which is a very weak signal to begin with. What should I do to improve things? The setup was on the house when I bought it and only has C band.