This morning I was watching my HD 505 receiver and every time I turned it on - it would always default back to SC channel 299. Many of the channels are not coming in - the guide shows up etc...but just a blank screen. I tried the same channels on another receiver and no problem. I just lost Detroit ABC HD channel. How does one reboot - if thats what it needs or any other suggestions would be a great help. The Super Bowl is only hours away. Thanks JackM