prstlk,
A couple things here. First, you bought the coach with the King Dome already installed, correct? Second, it's possible that, that particular King Dome, is programmed for Direct TV, not Dish. If that's the case, you're receiver will never work. I'm by far, no expert on this situation or, have the real ability to tell you which way to go on this.
But, you first need to figure out, if your King Dome is, or is not programmed for Direct or, Dish. I've been told it's not that hard to convert, from one company to the other on that King Dome but, I have no knowledge on how it's done. And, there's one other thing you need to find out. And that is, even if your King Dome is programmed to receive Dish signals, is the King Dome working correctly?
You see, many of the King Dome models had issues in the past. That's why many folks have chucked them in favor of installing the newer Wingard Traveler. The way the King Dome works is, (if you're not sure on how it works) by turning the system on, with the one button or, toggle, you reveal that there's power to the control box.
Then, you push and hold, the other toggle in the "Search mode" for about 3 seconds, plus or minus, as Dennis said. Once that's done, the King Dome will start it's search. Two things can happen at this point. One, it will find a bird, and "start" to lock in on it. It will change it's tone and sound as it begins to lock. And, the status light, on that control box, will go from red to yellow and finally, blinking green.
But, it's possible that, it will lock or, begin to lock, ON THE WRONG BIRD!. If it's working correctly, and does lock on the wrong bird, it will cease it's searching temporarily and, the status light will remain blinking green. But, it (the King Dome) will soon figure out, it's the WRONG BIRD. Then, it will go into another search, automatically.
Now, if and when the correct bird is found, it will do the same reaction. It will change its tone and speed of search. It will begin to lock on it and the status light will again, turn to blinking green. If the King Dome is functioning correctly, once the correct bird is found and locked in on, the status light will go from blinking green to constantly steady burning green.
At that time, the King Dome is now communicating with the Receiver and, when they both recognize each other and, all is well, it will begin sending signals/channels to your TV.
Now, one of the issues that King Dome had, and may still have for all I know, is, the part that locks on to the correct bird and shuts down the searching, goes bad. And when that happens, it will still find the correct bird but, it will only momentarily shut its search down and the status light will continue to blink green. When the system still sees a blinking light, it will begin the search, all over again. And, it will continue to do that, FOREVER!
But, hopefully your King Dome is working correctly and doesn't have that problem. Good luck.
Scott