The past couple of days I've been having an issue where I am only getting audio and no video (just a black screen) on at least one of my set top boxes.
I can use all the menus, the guide, and watch DVR programs just fine. It is only live TV.
Occasionally if I switch channels I'll get video back for at most a few minutes before the video goes black again.
Can anyone provide any help towards solving this issue? Thanks.