I am new to Lightroom. I may have messed up the settings, but I can't figure out the problem. I can work with my pictures until I move to "Develop." Then all I get is a blue screen with 2 diagonal lines. I can see the picture in the upper left and bottom tray. But I can't get anything to display in the center picture area.
Go to the performance tab in your Lightroom preferences and uncheck the GPU option.