We tried it all. We have no obstructions in the line of sight. The dish itself is an older 500 so it could be anything at this point. We called Dish and now have the $8/month service plan which covers all equipment and no cost service calls. A dish tech will be her this week to check it all out and also get us an upgraded HD dish and the latest receiver. We just upgraded our equipment in our house so now it will all be the latest/greatest. The plan even covers if we are away from home in the RV they will send a local tech to us. If the equipment breaks down it is free replacement and service call. We only have to keep the plan for 6months which means $48 vs $150 or more just for the new dish itself.