Remove the dome and run a new coax directly from the receiver to the silver electronics box inside the dome. Now you can tell if the dome works or not and then work your way backward from there.
I am assuming you are not using a receiver from your home. If you are, it's likely setup for SWM which does not put out any voltage. You would need to go into the receiver setup and use the Repeat Satellite Setup routine to change it to 18" round antenna and Mulitswitch (not SWM) to get the receiver to send voltage. You cannot use a Genie / Client or H25 receiver.
