Using this video processor is easy. First, make sure you connect it to the correct power supply that comes with it. When setting up your inputs and outputs, be aware that Output 4 DVI - D 1A is not working, so avoid relying on it. Regarding the power button, even though the cap is missing, it still functions, so just press it normally to turn the device on or off. For maintenance, keep it in a clean and dry place. Regularly check the connections to ensure they are secure. If you notice any new issues, it's a good idea to get it checked by a professional.