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The hard disk video recorder is an important part of the weak current video surveillance system, especially for analog video signals, the hard disk video recorder is even more indispensable. Centralized processing and storage, and output screen to monitor for monitoring.
First, the role of hard disk video recorders.
Hard disk video recorder (Digital Video Recorder, cited DVR), that is, digital video recorder, compared to the traditional analog video recorder, uses hard disk recording, so it is often called hard disk video recorder, also known as DVR. It is a computer system for image storage and processing, and it has the functions of long-term video recording, audio recording, remote monitoring and control of images/voices.
Second, the common failures and solutions of hard disk video recorders.
1. What is the reason for the jitter in the display screen?
This situation is generally caused by the display refresh rate being set too low. Enter "Display Properties", click "Settings", select "Advanced", and then "Monitor", adjust the new frequency to 75HZ, and it can be resolved after confirming and exiting. This problem.
2. Why does a screen saver or a black screen appear on the display after the monitor is turned on for a period of time?
This situation is caused by not canceling the screen saver or improper power management settings. The solution is to exit from the monitoring system to the WINDOWS operating system interface, click the right mouse button on the interface, select "Properties", select the screen saver in the tab that appears, and select (none) to disable the screen saver. Then click the settings button in the lower right corner, select "Always On" in the power usage plan, the system waits to select "Never", turn off the monitor and select "Never", select "Never" in the "Turn off the hard disk", and finally click Just "OK".
3. The digital hard disk video recorder's image display only has images without operation buttons or the screen is not full of the entire screen. What is the reason?
Under normal circumstances, the display resolution setting does not meet the requirements. Set the desktop resolution to 1024*768 and change the small font to large font.
5. How to solve the problem of unable to loop recording or crashing after the recording is full?
First of all, read the instructions of the host carefully, and confirm whether the recording mode currently set is "one-time recording" or "circular recording". Secondly, this situation is probably related to the tools used for hard disk partitioning. It is recommended not to use any hard disk partitioning tools.
6. Why is there no display when booting up?
Please make sure that the chassis and monitor are properly connected, and the power source is connected and turned on. The machine body may loosen the internal board card accessories during transportation and moving. It is best to open the case before starting the machine, and then power on after confirming that the components are connected tightly and correctly. If the motherboard self-check is abnormal when starting up (the normal performance is that the keyboard indicator LED flashes once and the host buzzer emits a beep), please turn off the power, check whether the CPU board and the graphics card are fully inserted, and the board can be removed Plug it back in. If the CPU fan does not rotate after pressing the power switch and the panel power indicator does not light up, please check whether the power supply is properly connected.