A display apparatus comprising: a cabinet; a light emitting diode module provided in the cabinet; a communicator configured to receive an ambient atmospheric measurement value based on an ambient temperature and ambient humidity around the cabinet from an external device (10, 20); a temperature sensor provided in the light emitting diode module; and a temperature controller configured to control a temperature of the light emitting diode module; and a controller configured to: during a standby mode in which the display apparatus is in a power saving state, if the temperature of the light emitting diode module is equal to or lower than a dew point temperature, control the temperature controller to transmit a control signal to the external device (10, 20) to modify the dew point temperature by lowering the ambient temperature and/or the ambient humidity; and while switching to an active mode in which the display apparatus is in a normal power supply state, and before an image is displayed, if the temperature of the light emitting module is equal to or lower than the dew point temperature, drive the light emitting diode module so that the temperature of the light emitting diode module becomes greater than the dew point temperature. a cabinet; a light emitting diode module provided in the cabinet; a communicator configured to receive an ambient atmospheric measurement value based on an ambient temperature and ambient humidity around the cabinet from an external device (10, 20); a temperature sensor provided in the light emitting diode module; and a temperature controller configured to control a temperature of the light emitting diode module; and a controller configured to: during a standby mode in which the display apparatus is in a power saving state, if the temperature of the light emitting diode module is equal to or lower than a dew point temperature, control the temperature controller to transmit a control signal to the external device (10, 20) to modify the dew point temperature by lowering the ambient temperature and/or the ambient humidity; and while switching to an active mode in which the display apparatus is in a normal power supply state, and before an image is displayed, if the temperature of the light emitting module is equal to or lower than the dew point temperature, drive the light emitting diode module so that the temperature of the light emitting diode module becomes greater than the dew point temperature. during a standby mode in which the display apparatus is in a power saving state, if the temperature of the light emitting diode module is equal to or lower than a dew point temperature, control the temperature controller to transmit a control signal to the external device (10, 20) to modify the dew point temperature by lowering the ambient temperature and/or the ambient humidity; and while switching to an active mode in which the display apparatus is in a normal power supply state, and before an image is displayed, if the temperature of the light emitting module is equal to or lower than the dew point temperature, drive the light emitting diode module so that the temperature of the light emitting diode module becomes greater than the dew point temperature.