When you say it displays 1/4 of the screen is it a small square in the middle or it only shows the top or bottom 1/4?
If it's the middle thing, you need to go online and download the proper video driver for your laptop model, and then set the resolution. Depending on your OS, there are different methods of doing that.
If it only shows you the top or bottom part of the screen, you do have an issue with the screen.