How to solve the problem of LCD advertising machine?

LCD advertising machine is currently a new platform for advertising communication. Its fields include transportation hubs, shopping malls, museums, banks and many other public places. The service life of LCD advertising machine is as long as 6-7 years. LCD advertising machine is in use The possibility of problems in the process is inevitable, 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 of the LCD advertising machine for inspection 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 ruled out. Secondly, check the power supply of the decoder board, advertising machine driver board, high voltage bar, speaker, and LCD screen in turn to see if there is a problem with the accessories that causes the power failure.

2、LCD advertising machine automatically shuts down after booting

Firstly, distinguish whether the menu setting of the LCD advertising machine is in the state of regular shutdown; if the machine shows a short circuit phenomenon, the main board can be replaced; if the high-voltage bar is not working properly, replace the high-voltage bar; the remote control is not working.

3、When switching on and off the LCD advertising machine, there are disturbing noises on the screen

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

4、There is no sound and no display on the screen when the LCD advertising machine is started. At this time, the indicator light on the front panel may be 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. If there is a loud noise from the speaker, it means that the driver board of the advertising player has been damaged. , 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 strong enough, and carefully check whether there is any problem with the interface of the signal line. If there is any damage such as bent or broken pins, it should be replaced in time.

5、The screen of the LCD advertising machine is seriously flickering

Please check whether there is magnetic field interference around the LCD advertising machine; please check whether the power supply voltage is stable; please check the monitor and graphics card driver; increase the refresh rate to 75HZ; if it still does not work, you can only find the LCD advertising machine manufacturer for repair.

6、LCD advertising machine produces chromatic aberration after using for a period of time

How can we slow down its light decay speed and not be troubled by it. Firstly, the power level is controlled, and the output power of the local oscillator 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. The jump attenuator used in radar anti-jamming: it is a variable attenuator whose attenuation can change suddenly. It does not introduce attenuation at ordinary times, but suddenly increases the attenuation when it encounters external interference.

Advertising machine manufacturer Mai Jun Technology MELDRE reminds users that LCD advertising machines that exist as electronic products should also be cleaned regularly by special personnel, pay attention to the instructions for the use of LCD advertising machines, and do not disassemble the machine without permission.