Just some questions..
Did you have the dealer go through the setting on your TV during the PDI?
Is your dish on the roof or do you set it up on the ground.
Have you gone to the TV menu to set it to your Sat Connection. On most of the new TV's you have a menu to go through to set it to the proper in put. You will have one input from the Antenna/Cable connection, the DVD connection, the Satellite connection. Some of these selections from your menu might be, Antenna/Cable, Composite 1, Composite 2 and such.
It would help to know if you have been through the menu on the TV, and what type of Satellite system your using.
BC