Satellite no signal

Hi,
I have a set of dish satellite equipment, with a Echostar 3900 upgrade ,and a Dish 500 antenna. After I have started up the receiver, and entered my zip code in the satellite set up menu, I am able to get the elevation, azimuth and skew number, I followed the instruction, but I still not able to get the signal, may I know if anything wrong with my cable? receiver? or the dual LNB? I have been trying to get this satellite set working  for 2 months, still no luck, I am planning to sell all the satellite set if I am still not able to fix it. Hope any of you can really help me out.  
Thanks a lot!
Sakai

Well Sakai, you're asking a satellite TV question in a broadband satellite forum. But pointing is pointing, so the first question I have to ask is whether or not your mounting arm or pole is perfectly plumb. If not, any calculated azimuth/elevation/skew numbers are useless.
 
//greg//