I got Dish Network set up a few days ago with two dual-tuner 322s. The two TVs on one of the receivers work great, but I'm having problems with the other receiver. I noticed that it sometimes said "acquiring satellite" when changing channels, then it would sometimes say "check switch." I tried the check switch test and now I can't get any programming. I called Dish tech support and they seem to think it might be a cabling problem. They're sending a tech, but not until Monday. Any ideas on what I could try