The monitoring video image changes from color to black and white for the following reasons: the camera function is limited: if the camera chip used is a color-to-black chip, the monitoring camera will shoot a full-color picture when the light is sufficient during the day, and it will automatically switch to the mode of turning on the infrared light at night or when the light is insufficient, such as cloudy days, when the chip will turn to black and white, the picture will naturally turn to black and white. You can make changes in the function settings according to the operating instructions. There is something wrong with the image of the camera, including the problem of color storage and transmission, or the camera and video camera are aging, which may cause the color to turn black and white. The camera or video camera needs to be replaced. The monitored video line has poor contact, that is to say, the circuit receiving the image signal in the video has virtual welding. You can weld the virtual welding place again, and the connection will be solved. As for where it can be repaired, this company specializing in intelligence can repair it. If you are in Xiaoshan area, the golden key intelligence is not bad. Our company was originally founded by them. Call them if you have any questions and fix them soon.