16:9 is the proper aspect ratio for your TV to show a full acreen with no black bars. If your unit is set on 16:9, then the picture size is being controlled by the device that shows the picture at the wrong size. You should either call support for this device or go into the menu of the device and set the picture size there.
Hope this helps.
I raised this problem 2 days ago but it righted itself so I did not follow it up. However, the problem has reappeared so I have started a new Thread.
My Samsung TV (UE32D6530) has black borders at top and bottom of the screen and the image is too wide. The Picture Size is set at 16:9.
The only way I can get a true image is by switching to 4:3.
The above occurs when using the built-in Freeview but there is no problem when using a separate Freesat Set Top Box.
I would be grateful for advice,