A current detection unit that monitors changes in two types of voltage produced by the voltage control unit, and detects and abnormal current flowing due to a potential between the two types of the voltages at both ends of the voltage control unit and an HPG control that receives a control signal of a constant voltage supplied from the information processing device, and transmits a HPG signal to the information processing device based on the abnormal current detected by the current detection unit and the control signal, wherein the HPG signal is a signal indicating a supply state of the direct current power voltage.