The screen appearing in black and white may result from various reasons:
Night mode or infrared night vision: Many surveillance cameras feature a night mode function. When the lighting conditions are insufficient, the camera will automatically switch to black-and-white mode or utilize infrared night vision. This enhances image quality in low-light environments.
Camera settings: This might be due to the camera settings being configured for black-and-white mode. You can check the camera settings and switching to color mode.
Insufficient lighting: In environments with inadequate lighting, color images may not be clear. Therefore, the camera may automatically switch to black-and-white mode to improve image quality.
Camera malfunction: if none of the above methods resolve the issue, it could be a malfunction with the camera itself, preventing it from capturing color images properly.