According to technical support documentation from Importaciones Pérez , the error is often triggered by physical obstructions or environmental factors rather than a hardware failure:
Understanding and Fixing Konica Minolta Error Code 9903 Konica Minolta multifunction printers are reliable workhorses, but encountering an error code can halt office productivity. One error that technicians and IT administrators occasionally face is . konica minolta code 9903
This error is often displayed as "99-03" on the control panel. Older documentation may also refer to it simply as "9903". konica minolta code 9903
Press the main power button on the control panel to safely shut down the interface. konica minolta code 9903
Help you find the procedure for a specific Konica Minolta bizhub model .