In recent years, with the continuous development of digital signal technology, commercial display has been widely used in all walks of life. Fast and efficient digital offices and digital surveillance have become the biggest bright spot, and are used in many public areas, especially in areas with high population flows. However, some problems will inevitably occur during use. What are the basic failures of the LCD advertising machine?
1. There are large and small black spots on the LCD advertising machine screen:
The problem with this screen is mainly caused by squeezing. Under the action of external force, the polarizer in the LCD screen will be deformed. The polarizer is like aluminum foil and will not bounce up after being recessed. Therefore, the reflection of the liquid crystal panel is different, and the gray part will appear. This part is easy to find under the white screen. The size of the polarizer is usually more than a dozen square millimeters, which is the size of a thumb. Be careful not to squeeze the LCD advertising machine screen with your hands. Such a failure will not affect the customer's use. This is one of the basic faults of the LCD advertising machine.
2. The LCD advertising machine has a black screen and the indicator light flashes:
After this problem occurs, the user should check whether the signal cable connection between the monitor and the computer is firm, and check whether the signal cable socket is disconnected or bent. It is also easy for users to encounter basic failures of LCD advertising players.
3. The screen is black and displays "Signal out of sync range" or "No sound":
This phenomenon is a thorny problem that users often see in practical applications. The signal from the host controller exceeds the display range of the display. The monitor will produce an abnormality and stop running. In this regard, the user can try to restart the monitor and reset the output frequency of the computer. The basic failure of this LCD advertising machine is also a very difficult problem for customers.
4. The LCD advertising machine does not respond after plugging in the power supply:
The failure of the response of the LCD advertising player to the power plug is a common problem in practical applications. In this regard, the user can try to detect the advertising machine. First, check whether the power cord of the LCD advertising machine is in the corner and whether the socket is disconnected or loose. Specific method: Use a multimeter to measure whether the indicator light is on. If the indicator light is on, it means that the power supply is powered on. In order to eliminate the power supply problem, the user must check the power supply of the decoder board, advertising player drive board, high-voltage bar, speaker, and LCD screen.
5. The LCD advertising machine screen flickers.
Flickering on the LCD screen during the use of the LCD advertising machine is a very common problem. In this regard, the user must first check the external factors such as the magnetic field around the device and the supply voltage. If it is still not applied correctly, you must check the display card driver of the monitor thoroughly to eliminate the installation program problem. If the above operations cannot achieve satisfactory results, the assistance of professionals is required. The user needs to send the equipment to the repair station for inspection.
