If the output does not fit the display screen due to the wrong Aspect Ratio, you can try selecting a different Aspect Ratio through the receivers Admin GUI.
You will need to first log into the Admin GUI of the receiver. Once logged in follow the steps below.
1. Go to the Features tab page by clicking the Features tab.
2. Go to the Aspect Ratio line, and select a proper option in the Aspect Ratio drop-down box.
*Note: For the case of selecting the 4:3 setting, you can also fine tune the horizontal and vertical offsets.
3. Click the Apply button, and then click OK on the pop-up message box to confirm.