Answer:
Are you tuning the TV to the required channel and changing channels through the satellite receiver and not the TV? With Dish, the TV is tuned to channel 03 and then the signal comes through. Unless it's a dual tuner receiver, then TV1 is on 03 and TV2 is on 73 or 83, I forget! LOL
Are you using an HD receiver or a standard def receiver? If it's an HD, the best way (best picture quality and easiest) is to use and HDMI cable. You don't need an expensive one for broadcast TV, a respectible one is good enough. Don't buy the cheapest one you can find either. That's connected HMDI out on the receiver and HDMI in on the TV.
If you're using Standard Def receivers, they usually work just on TV but I have seen some that need the assignment of video one or two. Make sure you're cabling from a video out to a video in on the TV. They are usually marked with little signs on the unit.
I tried looking up your model and came up with nothing so I can't help you there. But be sure you have the TV correctly tuned to the channel for the receiver. I have had more than one person bang their heads against the wall for hours and that was the issue.
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check first the receiver and determine which is the video out slot. plug in the yellow cable then attach the other end in your tv which is video in. it usually is yellow.
on your tv, scan all the channels. on your remote there should be an auto scan channels.