At present, digital signage LCD advertising all-in-one has become an important digital information dissemination platform. It can be used not only in transportation hubs, but also in shopping malls, museums, banks and other public places. Published vectors increase revenue. Under normal circumstances, the normal service life of the LCD advertising machine can be as long as 6-7 years under the condition of working 7*24 hours, so it is very necessary for users to master some common LCD advertising machine fault solutions.

1. There is no sound when the LCD advertising machine is started, and the screen does not display. At this time, it may be the problem that the indicator light on the front panel is flickering.

       If there is no sound, you can open the back cover of the LCD advertising player, use a multimeter to check whether the driver board is powered on, and then check whether the connection of the speaker cable is normal. , you can replace it. If there is no display on the screen, the user can check whether the signal connection between the monitor and the computer is firm enough, and carefully check whether there is any problem with the interface of the signal line. If the pins are bent or broken, they should be replaced in time.

2. The screen of the LCD advertising machine flashes seriously

       Please check whether there is magnetic field disturbance around the LCD advertising machine; please check whether the power supply voltage is stable; please check the display and graphics card drivers; increase the refresh rate to 75HZ;

3. The LCD advertising machine is used for a period of time to produce color difference

       How can we slow down its light decay speed and not be bothered by it. First, the power level is controlled, and the local oscillator output power is controlled in the microwave superheterodyne receiver to obtain the best noise figure and frequency conversion loss to achieve the best receiving effect. In microwave receivers, automatic gain control is implemented to improve dynamic range. Hopping attenuator used in radar anti-jamming: it is a variable attenuator with sudden change in attenuation. Usually, no attenuation is introduced. When encountering external interference, it suddenly increases the attenuation.

4. When the LCD of the LCD advertising machine is switched on and off, there will be disturbing patterns on the screen.

      This situation is caused by the signal interference of the graphics card, which is a normal phenomenon. This doubt can be handled by automatic or manual phasing.

5. There is no response after the LCD advertising machine is plugged in

       First check whether the dedicated power supply is powered on, which is a common problem in practical applications. You can try to remove the back cover of the LCD advertising machine to check to see if the wires are falling off or loose. Test method: Use a multimeter to measure whether the indicator light is normal. If it is normal, it proves that the power supply is powered, and the problem of power failure is eliminated. Next, check the power-on status of the decoder board, the advertising machine driver board, the high-voltage bar, the speaker, and the LCD screen in turn to see if there is a problem with the accessories and the power is not on.

6. The LCD advertising machine will automatically shut down after it is turned on.

       First of all, identify whether the menu setting of the LCD advertising machine is in a punctual shutdown state; the machine shows a short-circuit appearance and can replace the main board; the high-voltage bar is not working properly, replace the high-voltage bar; the remote control does not work.

7. There are thumb-sized black spots on the LCD screen of the LCD advertising machine

       This condition is largely caused by external pressure. Under the pressure of external force, the polarizer in the liquid crystal panel will be deformed. This polarizer is like aluminum foil, and it will not bounce up by itself after being pressed into it. This forms a difference in the reflection of the liquid crystal panel, which will show what you see. Dark, some of them are easy to find under the white screen, usually the size is more than ten square millimeters, that is, the size of the thumb, this will not affect the service life of the LCD, please pay more attention in the future use, do not touch it with your hands Press the LCD screen.