Need some help with a strange issue when I try to connect my Direct TV DVR up. When the DTV tech showed up he got the dish up and ran new cables to my tv, he hooked up the DVR and got no tone when trying to aim the dish. He thought the dvr was bad so he hooked up just a sat receiver - and got tone immediately. He then brought in anothe DVR and again no tone. He said there must be something wrong with the tv (I just bought the tv a week ago Olevio 42"). Everything was hooked up per the instructions included with the TV - any suggestions?