A method for testing video output devices, comprising the following steps of • receiving a test signal from a video output device to be tested via a video input, • adjusting the DC levels of received test signal, • separating the vertical and horizontal synchronization signals (9, 8) of the received test signal, • transmitting the vertical and horizontal synchronization signals (9, 8)and adjusted test signal to a micro-controller, • identification of the macro-blocking and frame skip problems on the image input signal by micro-controller using said synchronization signals (9, 8)and adjusted test signal, and characterized in that • said micro controlled does not include an analog-to-digital ADC converter and identifies the macro-blocking and frame skip problems on the image by using said synchronization signals (9, 8) and adjusted image input signal without needing to convert to digital. • The mentioned test signal consists of vertical black & white strips moving towards right and is implemented to a clock inlet of a timer in the micro-controller, • In the adjustment step, positive DC component is added to the mentioned test signal at a circuit inlet of a signal regulating circuit, and it is cleared off negative signals, and transmitted to the micro-controller, • The change of black & white levels of the test signal in the micro-controller is counted by the timer as number of vertical strips in the test signal implemented as moving towards right and each line value is saved when a new horizontal synchronization signal is received, • For a frame, comparing saved lines values in order to identify macro-blocking, • For every frame, calculating the time difference between each horizontal synchronization signal and the passage point from the first black to white or white to black change in order to identify image freeze. • receiving a test signal from a video output device to be tested via a video input, • adjusting the DC levels of received test signal, • separating the vertical and horizontal synchronization signals (9, 8) of the received test signal, • transmitting the vertical and horizontal synchronization signals (9, 8)and adjusted test signal to a micro-controller, • identification of the macro-blocking and frame skip problems on the image input signal by micro-controller using said synchronization signals (9, 8)and adjusted test signal, • said micro controlled does not include an analog-to-digital ADC converter and identifies the macro-blocking and frame skip problems on the image by using said synchronization signals (9, 8) and adjusted image input signal without needing to convert to digital. • The mentioned test signal consists of vertical black & white strips moving towards right and is implemented to a clock inlet of a timer in the micro-controller, • In the adjustment step, positive DC component is added to the mentioned test signal at a circuit inlet of a signal regulating circuit, and it is cleared off negative signals, and transmitted to the micro-controller, • The change of black & white levels of the test signal in the micro-controller is counted by the timer as number of vertical strips in the test signal implemented as moving towards right and each line value is saved when a new horizontal synchronization signal is received, • For a frame, comparing saved lines values in order to identify macro-blocking, • For every frame, calculating the time difference between each horizontal synchronization signal and the passage point from the first black to white or white to black change in order to identify image freeze.