Have you contacted tech support?never going back to Lenovo
The aspect ratio problem should have a very simple solution, as in some kind of 'fit' feature to dial the fresh monitor into your graphics card.
Does the color. bright, contrast gang have an overall control option like 'text', graphics', 'standard', 'movies', 'User' selections?
Should have a focus control too.
That ain't workin'... more cowbell