A display, in particular computer monitor, analog television or digital television, having a control circuit, the control circuit comprising: a transforming device, having a primary side and a secondary side, for converting a relatively-high voltage at the primary side to a relatively-low voltage (VCC5V) at the secondary side; a power conversion controller providing a control signal (DRV, DRV'), for controlling the transforming device; a first capacitor coupled to the power conversion controller; a second capacitor, coupled to the secondary side of the transforming device, for stabilizing the relatively-low voltage (VCC5V); a regulator, coupled to the second capacitor, for regulating the relatively-low voltage (VCC5V) into a regulated DC voltage output (VDD3V3); a display controller, coupled to the regulator, for being powered by the regulated DC voltage output (VDD3V3) for operations; an opto-coupler coupled between the display controller and the power conversion controller and adapted to switch on or off a coupling current in dependency of a signal (AC_OFF) output by the display controller; and wherein the power conversion controller comprises a controlled current source adapted to supply a DC voltage signal (VDDp') for powering the power conversion controller by charging the first capacitor; characterized in that the first capacitor is coupled to the power conversion controller for temporarily powering the power conversion controller, the display controller is adapted to detect the regulated DC voltage output (VDD3V3) and to compare the regulated DC voltage output (VDD3V3) to a reference voltage, when the regulated DC voltage output (VDD3V3) is higher than the reference voltage, the display controller is asserting the signal (AC_OFF) such that via the opto-coupler the power conversion controller does not charge the first capacitor by the voltage signal (VDDp'), and when the regulated DC voltage output (VDD3V3) is close to the reference voltage, the display controller is de-asserting the signal (AC_OFF) such that via the opto-coupler the power conversion controller charges the first capacitor by the voltage signal (VDDp'). a transforming device, having a primary side and a secondary side, for converting a relatively-high voltage at the primary side to a relatively-low voltage (VCC5V) at the secondary side; a power conversion controller providing a control signal (DRV, DRV'), for controlling the transforming device; a first capacitor coupled to the power conversion controller; a second capacitor, coupled to the secondary side of the transforming device, for stabilizing the relatively-low voltage (VCC5V); a regulator, coupled to the second capacitor, for regulating the relatively-low voltage (VCC5V) into a regulated DC voltage output (VDD3V3); a display controller, coupled to the regulator, for being powered by the regulated DC voltage output (VDD3V3) for operations; an opto-coupler coupled between the display controller and the power conversion controller and adapted to switch on or off a coupling current in dependency of a signal (AC_OFF) output by the display controller; and wherein the power conversion controller comprises a controlled current source adapted to supply a DC voltage signal (VDDp') for powering the power conversion controller by charging the first capacitor; characterized in that the first capacitor is coupled to the power conversion controller for temporarily powering the power conversion controller, the display controller is adapted to detect the regulated DC voltage output (VDD3V3) and to compare the regulated DC voltage output (VDD3V3) to a reference voltage, when the regulated DC voltage output (VDD3V3) is higher than the reference voltage, the display controller is asserting the signal (AC_OFF) such that via the opto-coupler the power conversion controller does not charge the first capacitor by the voltage signal (VDDp'), and when the regulated DC voltage output (VDD3V3) is close to the reference voltage, the display controller is de-asserting the signal (AC_OFF) such that via the opto-coupler the power conversion controller charges the first capacitor by the voltage signal (VDDp').