As indicated in my first paragraph, I was having video problems with a HR-20. I could see the guide, menu and setup, but the channel would not show up. Called Directv tech and after about 1.5 hours, they wanted to send a tech. I didn't want to pay for it, so I decided to troubleshoot myself. I was pretty sure it wasn't the cables, but I changed the DVR out for another one and sure enough it came right up. So, it had to be the HR-20. It acted like it was the tuner. Took it apart and didn't see anything obvious. On a hunch, I decided to change the harddrive. Bought a WB 1 terabyte SATA drive. Put it in and it works better than new. Faster and, of course, more storage. Go figure why the harddrive gave such indications.