The Reason Why Pos LCD Monitor flash
Now that the Lcd display has bid farewell to the era of CRT, it has entered the era of liquid crystal. The biggest feature of liquid crystal displays is flicker-free and radiation-free. However, the display surface will also appear flickering problems, and the face painting is also shaken badly. In general, there are two types of reasons. One is a software fault, which can be eliminated by the user himself. The second is a hardware failure, it will need to send the monitor to a service station.
Pos LCD monitors generally have three interfaces: VGA (analog signal), DVI (digital signal,HDMI . When the VGA signal is input, the video card converts the digital signal to an analog signal through the DAC, and then converts the digital signal through the ADC of the display. After two conversions, it is bound to affect the signal. The biggest problem is that the phase and clock are not synchronized. This lack of synchronization can cause the problem of pixel jitter in the liquid crystal display, which is particularly manifested in the picture blurring. It is found that the pixels regularly jum,after careful observation. The causes of jitter include the following:
1. Bad display card VGA signal output. At present, many video card VGA parts are simplified and severe, and can only adapt to CRT monitors. After encountering the liquid crystal display, the original appearance is exposed, especially the integrated display card. The solution is to replace the display card. If the monitor card has DVI-I, use the adapter to use the DVI connector.
2. The refresh rate is incorrect. Many LCDs require a standard 60 Hz refresh rate, but in reality many displays only operate at 75 Hz to avoid phase problems. However, some monitors are just the opposite. It is best for users to try different settings on their own.
Setting method: Right-click on the screen Properties - Enter Settings - Select Advanced Enter Monitor Settings - Select Monitor Select the screen refresh frequency here.
3. poor display design. We usually have no way to solve it and can only rely on you to adjust it in the menu. However, according to our experience, a good display card helps a lot.
4. The monitor is damaged. If all three methods are tried, a large percentage of the monitors are damaged and it is best to send them for repair.