An electronic device which has a self diagnosis function and a self diagnosis method using the same are provided. The electronic device includes an interface which receives a user's selection signal for a hardware of an object to be diagnosed, and a controller which provides a plurality of lines connected to the hardware of the object to be diagnosed with a signal for diagnosis according to the selection signal which is received through the interface and calculates a diagnosis result for the hardware of diagnosis object according to a comparison result of the signal for diagnosis with a return signal which is returned from the hardware of the object to be diagnosed by a loop-back.