I have a new samsung 720 plasma TV, And am for the most part amazed with the picture. The aspect ratio has 16:9, 4:3, just scan,. No zoom 1, or zoom2 when using my comcast cable box connected thru HDMI. I do get the scan features when hooked up just cable without the box, and using the tv tuner. how to get the zoom feature back when hooked up this way, samsung doesn't seem to know. Their suggestion was to use the HD zoom feature on the comcast remote. any help would be appreciated. JD