Rui Guan

It shows that the power supply has electricity, which solves the problem of power failure. Then check whether the detoxification board, advertising machine drive board, high-voltage bar, speaker and LCD screen are powered on in turn, and confirm that there is something wrong with the accessories and they cannot be powered on. Automatically closes after a period of use or when the lcd advertising machine is just opened. In order to ensure that lcd advertising machine's menu settings are turned off regularly and the machine is short-circuited, the motherboard can be replaced. The high voltage bar is not working properly. Replace the high voltage bar. The remote control is broken.

Lcd advertising machine starts with no sound and no video. The indicator light on the front panel may flash. Silently open the back cover of lcd advertising machine, check whether the drive board is powered on with a multimeter, and then check whether the speaker line is connected normally. In the case of loud horn noise, this means that the driving board of the advertising machine is damaged and can be replaced. If there is no video on the screen, the user can check whether the signal connection between the monitor and the computer is firm, and check in detail whether there is any problem with the connector of the signal line. If it is damaged, replace the plug immediately (such as bending, breaking, etc.). The above are the solutions to three common problems in lcd advertising machine. If you don't understand, you can leave a message to consult Ruiguan.