Just found out that when Comcast installed my Motorola HD Cable box, they set it to output a 720p signal via the HDMI out to my 1080p-capable HDTV — technically this is HD, but at the lower end. Picture seemed blurry compared to other HD sources (BluRay, Netflix, etc).

In some cases your box may be outputting 480p, 480i or 480 Stretch (perhaps others), and the tech-help scripts do not point them to setting the device in the following way.

Fix: I found a solution online. (You must have an HD box and HD service, and your TV must be capable of displaying 1080i or 1080p).

  1. With TV on, turn the cable box power off
  2. Push the Menu button on Remote or Box
  3. Wait several moments for a User Settings menu to appear on screen. (It comes up, even with power off)
  4. Using cursor keys, navigate to the HDMI setting. It probably says 720p next to it. (if it says 1080i, that’s the max. Not many, if any, stations are broadcasting at 1080p)
  5. If it’s 720 or lower, press the OK/Select button. Screen will blank out and reappear with new setting. Every time you press the button, it jumps to a new setting. Do it until you get the highest your box offers.
  6. Once you have 1080i or 1080p showing, turn the power back on with the power button. You should now have a better picture.

For detailed information on the difference between 720p and 1080i click here.