A display panel is connected to a wiring-mounted board on which a signal supply wiring that supplies wiring supplies signals for driving the display panel is mounted. The wiring-mounted board has (i) first and second wires extending toward the display panel, and (ii) first and second terminals that are connected to the first and second wires, respectively. The display panel has a first short-circuit wire that is connected to the first and second wires at a connecting part of the display panel and the wiring-mounted board, so as to short-circuit the first and second wires.