FIELD: information technology.
SUBSTANCE: disclosed is a display device provided with a circuit board applicable to various models, wherein the operating modes of a system microcomputer on the circuit board can be switched without using a physical connector. The display device is provided with: a main board applicable to various models; and a TV microcomputer, which is provided on the main board and stores the set value data of each of the models. The main board is provided with: an external memory I/F which has external memory detachably mounted thereon, said external memory having the model identifying information of the display device stored therein; and a CPU which reads out the model identifying information of the display device from the external memory. The TV microcomputer specifies the set value data of the display device from among the set value data of the models based on the model identifying information of the display device, said model identifying information having been read out from the external memory, and the TV microcomputer switches the operating mode based on the specified set value data.
EFFECT: enabling switching of the operating mode of a system microcomputer located on a circuit board which is common for various models, without using a physical connection in the display device having said circuit board.
13 cl, 9 dwg
