Hello, the reason is very simple, because 1440 * 900 is the widescreen resolution, which is the best resolution of your display (19 inch widescreen), while the others are the ordinary resolution, so there are black edges, because they are aimed at ordinary displays. I hope it is useful to you.
There is a widescreen mode in the display menu, which can be changed from automatic mode to manual mode.In addition, if the 19 display 1440 * 900 is standard resolution, 1440 * 900 is recommended
There are several possibilities for this: 1. First, check whether the graphics card driver in your computer is normal. If you do not download a driver wizard normally, try updating it; 2. Reinstall the system to see if it can solve the problem; 3. If none of the above methods works, try replacing a display cable; 4. The last thing to consider is the video card! I hope I can help you!
