This printer has been working just fine. Yesterday, I turned the print off after printing for 3 or 4 hours. Everything was OK at that time. Today, I turned the printer on and the display screen remains blank except for a dark gray background and nothing else on the screen. Does anyone have an idea about what is causing the problem? Am I looking that the possibility of buying a new main board. Or perhaps a new screen. There is power going to the screen display because it displays a gray background.