A dynamic radon access memory module includes a printed circuit board, a number of DRAM units, a number of flash memory units, a number connecting pins and an interface controller. The element body has a pair of end faces opposing each other, a pair of main faces opposing each other while extending so as to connect the pair of end faces to each other, and a pair of side faces opposing each other while extending so as to connect the pair of main faces to each other. A schedule management function, a self-diagnosis management function and a component replacement time management function are performed and, if an emergency situation occurs while those functions are performed, a pop-up message is outputted to the screen and information related to the pop-up message is transmitted over the external communication network.