The printer power is not On. Cables and cords are not connected securely. Make sure that all of the cables and cords are connected properly. There is no power at the outlet that the printer is plugged into. Restore power to the outlet or move the printer to a live outlet.
Printing takes much longer than usual.
The image file size may be larger than usual, often a large PostScript file, and may therefore take longer to process. Wait a few minutes for the printer to finish processing the file. The printer is too warm. Turn Off the printer for ten minutes to let it cool down. Consider moving the printer to a location where the temperature is lower.