Well, there are no Horizontal Width or Vertical Height adjustments in your Service menu. They have sound, but that's about it.
LCD TV sets don't require those --
The only logical thing you can try is setting your Cable/Sat box to output a 4x3 picture and then set the Sony TV to WIDE mode so it fills the screen without clipping the Top/Bottom off.
Your cable box's resolution can be set to 1080 or 720 and that might help get the picture in if you try 720P.
Other than that, the only other choice would be to replace the scaler in the TV set.
I would ONLY do that if --
1] That box connected to your Sony was hooked to another HD TV set and the picture was NOT WIDE on it.
2] You HAD a properly sized picture on your TV set, and then one day it just oversized...it can happen, especially if you turned on your TV, or had a power glitch, or you were watching it one day and the picture suddenly popped wider on you.
Then I would be seriously looking at a scaler issue.
How many of those problems have I seen before?
If I exclude yours......NONE.
Never ran across a scaler issue, or a TV with too big of a picture that was an LCD TV set. Never.
It's always been the TV was set to Wide or Wide Zoom, or the Box was set to 16:9 when it was supposed to be set to 4x3 to fit the screen (I had ONE box that did that to me) or it was set to a ZOOM mode.
But that's it.
BOTH should be set to 16:9 on most setups. But like I said, I did have ONE guy that had to be set to 4x3 on his box to get his picture to fit.
That's been about 3-4 years back.
If you have any questions, just ask
Tips are greatly appreciated !