The monitoring monitor does not display the picture

Surveillance cameras are often used in our daily lives, and we often see cameras from various angles in large shopping malls. These cameras can clearly record all the behaviors of pedestrians and save the captured images. At the same time, staff can also quickly find an item through the camera.

# During the monitoring installation, the staff will adjust the monitoring screen to the best display effect suitable for this terminal. However, due to long-term operation, the monitoring screen may not be displayed normally. (Recommended learning: PHP video tutorial)

Below I will summarize a few possible reasons:

1. First determine whether it is a computer monitor Is the VGA cable loose? If so, tighten the VGA cable

2. Observe whether the hard disk video recorder is powered off and check whether the indicator light is on

3. Determine whether there is no picture from a single camera or multiple cameras. , or all of them cannot be displayed normally

4·A single picture failure may be a power outage of a single camera. Check the ledger to find the corresponding camera, or PoE power supply, find the corresponding port, and check whether the indicator light is on

5·After troubleshooting the line, check whether the camera is faulty. You can use the backup camera to access the test

6. If multiple or all of them cannot be displayed normally, there may be a setting problem or a camera IP conflict. In this case, we need to reassign the IP. Or automatically obtain

7. If it is not an IP problem, it may be a hard disk video recorder failure. Please replace it with a backup hard disk video recorder for testing. For more PHP related technical articles, please visit

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