Hello, I have an Echostar 4700. Starting early year it stopped working. I saw everything was red in the program guide on TV screen. It has been collecting dust since. I need expert's advise as to how to make it working again. There is a credit-card like card in the front. On the bottom of the box there is a rectangle hole of roughly 0.5'' X 1.5''. I can see some contact points on the circuit board. Any inputs are appreciated. Thanks