What is the reason for the bulge in the middle area of Dell notebook keyboard?
It's simple. Maybe the keyboard is physically damaged. You can call 8008580950 for repair, or you can go to the repair station designated by Dell and ask the maintenance personnel to help you repair it. (the content of the repair report is: casually say that one or two keys can't be used, and there is no response when pressed. Dell will help you get a brand new keyboard.