An apparatus for displaying an image includes a non-volatile memory device configured to store a first program and a second program; and a processor configured to load the first program onto a first area of a volatile memory device to execute the first program in a power-on state of the apparatus, wherein the processor includes a plurality of cores, and in a power-off state of the apparatus, the processor is configured to deactivate at least one of the plurality of cores, deactivate the first program loaded onto the first area, and load the second program onto a second area of the volatile memory device to execute the second program, wherein the first program and the second program, when executed, are configured to cause the processor to receive state information of an external device.