There's no signal from multiple cameras How to quickly find out which camera is not coming out?

One of the multiple cameras doesn't signal, how to check it quickly?

Check whether the camera is turned on normally. Press and hold the reset button to reset, and then troubleshoot the camera. According to the brand of the camera, download the management software from official website, install it on the computer, and then connect the computer to the same switch as the camera, and the computer network settings will be automatically obtained. Run the software to search the devices in the LAN to see if they can be found. If we can find them, the camera will be fine. 2. Check the switch to see if the indicator light is running normally. You can restart or try another switch, or try replacing the network cable. 3, really can't solve, you can contact the hard disk video recorder or camera customer service for support.