Could someone help me figure this out? I have dish network 500. I got it about two years ago. But just lately, like the beginning of this year, my channels started going away. I get that error message that it can't find the signal. But here comes the weird part, I can get most of my channels upstairs, but not all. And I can only get a handful of channels downstairs. I had someone look at it today and they think the LNBF is bad on the dish. What do you guys think? And another weird thing is like upstairs if I get that signal error message thing all I have to do is go into the guide menu and move up and down a little bit and usually it locks on to the signal. But I can't do that at all downstairs. It's very annoying. If any of you have and idea what this could be please help.