Is there a way to adjust the cable box so that the picture adjusted properly to fit the screen? Currently I have a Phillips 30 inch Widescreen HD tv and certain channels dont fit the screen. (ESPN News QVC Fox Business) . The Tv does not have a strecth or zoom feature, I looked in the manual.
What do you have your 4:3 override set to? Try setting it to "OFF". This will output in whatever your HD resolution is set to with "pillars" for SD content. The other thing is what do you have the output resolution set to? My guess is that your 30" set has a native resolution at 720p (or near that). If you are set for 1080i output it may be the scaler in your TV causing the image over the screen size issue.
I believe the 4: 3 override is set to off and the output resolution is set to 1080i, so you suggest trying it at 720p?
Just a stab at a possible fix. If your overide is off I assume you get pillars on the sides - if not then your set is doing some kind of stretch even though it is not a menu option.
Don't know the native resolution of your set, but most that are under 40" used to be 720p (768 or 700 something - not a true HDTV resolution) even though they will handle a 1080i input they have to "down-res" to display. It certainly can't hurt to try it and see if it fixes your issue. This might cause black bars above and below.
Certain HD channels are not always broadcast in widescreen so they will appear as 4:3 on your TV. If you want SD channels to fill the screen you need to set 4:3 override to 480i or stretch which ever one looks best on your TV.
Re-read the OP (it's in the title of this thread). His complaint was that the picture is too big, not that it doesn't fill the screen.