I just finished build my desktop today but after I installed the system I noticed the top part was missing half of it.(ps:I didn't install any indicated graphic card.) How can fix this problem?
Is it possible this is a hardware issue? Many monitors have buttons on the monitor itself for changing the position.
For example, there's usually a "Menu" button of some sort, which brings up a display box which looks something like this:
Obviously the relevant option would be "vertical position", or your monitor's equivalent setting.