An electronic device is provided. The electronic device includes a display panel, a display driver integrated circuit (DDI) that drives the display panel, a first connector that is connected to the DDI and that includes a first display pin and a second display pin, the first display pin and the second display pin being connected together, a substrate, a second connector that is connected to the substrate and coupled to the first connector and that includes a first board pin and a second board pin, one of the first board pin and the second board pin being connected to a resistor, and at least one processor mounted on the substrate and configured to determine at least one of a coupled state of the first connector and the second connector or a state of the DDI, based on a signal received from the first board pin or the second board pin.