I assume by "adjustment screen" you mean the OSD (On Screen Display). This is the box where the menus for adjusting the screen appear. If I'm correct, that means you have pushed the "menu" button on your LCD and need to push it again to turn the OSD off. If pushing it again does not solve the problem I would say it's time to have the LCD repaired. In many, but not all, that OSD goes off on it's own after a bit.