A display unit superimposes and displays characteristic-value information and power source sequence information on grid tree information. At this point, the display unit simultaneously displays a power source sequence that shows the power grid tree, the characteristic-value information, power on, and power off when the power pathway is displayed, arranges and displays the power source input unit and the power source unit in the power grid tree in relation to the power source sequence, and displays the power source input unit and power source unit in the order noted in the power source sequence to display the power pathway between mounted components that are mounted on a wiring board in an electronic device.
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