Hi Aric, Sorry I didn't realize it wouldn't include my original question! The issue is that when I turn on the TV to the high def input (HDMI 3 or 1) I see the picture for a split second, and then it goes dark. However, I can watch non high def TV if I select the video input. The problem first started a week ago (but I thought I fixed it but then realized I didn't). There is a DVD player connected but I don't use it.
Yes, the problem only happens with the HDMI inputs. When you say swapped it out for a new one - how would I do that? Do I just buy them at a store (also what do they look like)