Those prongs don’t look terribly low but its still pretty hard to tell. If the button is brand new (theoretically not defective but you never know) and the contacts work when activated manually, it sounds like the screen may be having a hard time seating properly. Is the frame bent at all? Are there any dings in the corners or sides? These are things that can cause the prongs to not seat far enough, or even seat off center. Make sure the screen is going all the way down.