I've got a wireless setup. For some reason all of a sudden when I open the guide on one of the wireless boxes and try to scroll it pauses the live video in the corner plays a high pitch squeling then becomes in responsive for about 5 seconds. Then the guide goes empty, I can see the grid but no channel names or programming data until I close the guide by pressing exit then going back in. As I wrote this I left the guide open blanked out the high pitch sound happened as the video froze then the guide closed after a timeout like it normally would. Any thoughts? I haven't called DIRECTV yet, thought somebody here might have a suggestion.