Image processing apparatus and inspecting method thereof

An image processing apparatus comprising:

• a connector comprising a connection pin configured to be connected to an external device;
• an interface which interfaces transmission of signals to the connection pin through a first wiring formed between the interface and the connection pin;
• a switching unit which is switched on to transmit a signal through a second wiring which is formed differently from the first wiring to feedback the signal from the connection pin to the interface;
• and
• a controller which controls the switching unit to allow the feedback of the signal through the second wiring to transmit a preset test signal from the interface to the first wiring at the time of inspecting a signal transmission state of the connection pin and the first wiring, and determines the signal transmission state based on a change of the test signal feedbacked to the interface through the second wiring,
• wherein the interface comprises a first interface module which is connected to the first wiring and interfaces transmission of the signal through the first wiring, and a second interface module which is connected to the second wiring and receives the signal through the second wiring, and wherein the switching unit is directly connected to the connection pin, the second interface module, and the controller.