في السنوات الأخيرة ، مع التطور المستمر لتكنولوجيا الإشارات الرقمية ، تم استخدام العرض التجاري على نطاق واسع في جميع مناحي الحياة. أصبحت المكاتب الرقمية السريعة والفعالة والمراقبة الرقمية أكبر نقطة مضيئة وتستخدم في العديد من المناطق العامة ، لا سيما في المناطق ذات التدفق السكاني المرتفع. ومع ذلك ، تظهر بعض المشاكل حتما أثناء الاستخدام. ما هي مشاكل الفشل الأساسية لأجهزة الإعلان LCD تلك؟
1. There are large and small black spots on the LCD advertising machine screen:
The problem with this on-screen distance analysis is mainly caused by squeezing. Under the action of external force, the polarizer in the LCD screen will deform. Polarizers are like aluminum foil, and they won't pop up on their own after being concavely pressed. Therefore, there is a difference in the reflection of the LCD panel, and a gray part will appear. This part is easy to find under the white screen. Polarizers are usually over a dozen square millimeters, or the size of your thumb. Be careful not to squeeze the LCD advertising machine screen by hand. Such a failure will not affect the use of customers. This is one of the basic failure problems of LCD advertising machines.
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 failure problems of LCD advertising machines.
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 is outside the display range of the monitor. The monitor will stop running abnormally, in this regard, the user can try to restart the monitor and reset the output frequency of the computer. The basic failure of the 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 LCD advertising machine to respond to the power plug is a common problem in practical applications. In this regard, users can try to detect the advertising machine. First, detect whether the power cord of the LCD advertising machine is in the corner and whether the socket is off 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, the advertising machine driver board, the high voltage bar, the speaker, and the LCD screen.
5. The screen of the LCD advertising machine flickers.
Flickering on the LCD screen during the use of the LCD advertising machine is a very common failure problem. In this regard, the user must first check for 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 comprehensively to rule out the installation program problem. If the above operations cannot achieve satisfactory results, professional assistance is required. The user needs to send the device to the repair station for inspection.
