I just had a tech install my new service on the 20th. He put in a slimline dish and a HD Dvr and two other regular boxes in the bedrooms. As soon as he left I changed the channel on the High Def TV and got a searching for signal message. The other two televisions in the house work fine. The receiver displays zeros across the board for the signal and no one will come to look at it until the middle of next month. Any one with any ideas what the installation guy messed up on? Reseting the box does not work. It will tune in to the channel and as soon as you turn to a new show it starts searching for a signal again.