1. A display generation system for connection to an aircraft display, the display generation system comprising: a processing engine configured to generate display signals for at least one first image, to one of generate and receive display signals for at least one second image, and to provide display signals for at least the at least one first image to the aircraft display; and an error detection system configured to perform error detection processing to detect whether at least one of the display signals for the at least one first image and the display signals for the at least one second image includes a graphical error and to generate at least one processing result indicating whether the error detection system detected a graphical error; wherein the processing engine is further configured to receive the processing result and discontinue the generation of at least the display signals for the at least one first image when the at least one processing result indicates the occurrence of a graphical error.