Reasons could be: 1. Battery is not inserted or has run out. 2. The camera is operating in extremely low temperature environ-ment. 3. There is water in the camera or software/system is malfunctioning. Please make sure to avoid the above. If you can-not troubleshoot the problem, please contact our support line: 400-100-7702 (Mon-Sun 10:00AM-8:00PM).