I did this many times and so did the Dish techs that came to the house. The LG TV has a self calibration setting. It really doesn't help my problem. This PQ issue was never a problem before Dish and this problem doesn't exist on the out door antenna. Dish did do something and the greenish cast is mostly gone, but the PQ is not good. The HD is almost SD. It's grainy and not sharp. A local installer that does both Dish and Direct told me to have Dish replace the Hopper 3. He claims that is my problem. Thanks.