Overscan issue with LG 22LH20R

[binario]

I recently bought used a LG 22LH20R 22-inch LCD TV. I know that is a very old model but it really fits my needs. My Wii connected with component cables at 480p looks amazing but I have a small problem with the position of the picture. I have small black bars located at both sides of the screen and as a result I also noticed that the picture is slightly squeezed vertically. It seems that you can't adjust the width or height of the video on component. I have access to the service menu but I don´t know if you can adjust it with that or how. Apparently the firmware is 3.06B. I attached a photo of the service menu and a reproduction of the issue. Any help would be greatly appreciated.

[JVRaines]

You can obtain the service manual at
https://elektrotanya.com/lg_22lh20r.djvu/download.html