The LCD advertising machine is a new platform currently used for advertising communication. The fields involved include transportation hubs, shopping malls, museums, banks and many other public places. The service life of the LCD advertising machine is as long as 6-7 years. The possibility of problems is unavoidable, so it is very necessary for users to master some basic troubleshooting solutions for LCD advertising machines.
1. 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 and check to see if the wires are detached 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.
2. The LCD advertising machine will automatically shut down after it is turned on.
It is necessary to identify whether the menu setting of the LCD advertising machine is in a punctual shutdown state; the machine shows a short circuit and the motherboard can be replaced; the high-voltage bar is not working properly, replace the high-voltage bar; the remote control does not work.
3. When 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.
4. When the LCD advertising machine starts, there is no sound 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.
5. 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;
6. 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 output power of the local oscillator is controlled in the microwave superheterodyne receiver to obtain a good noise figure and frequency conversion loss to achieve a better 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.
