Common Problems and Solutions for Vertical LCD Advertising Displays
**When playing files, the screen is black with no light or text, but there is sound.** This could be due to a loose high-voltage connection or a problem with the high-voltage system. If you cannot confirm this, try replacing the high-voltage cable to test. If the high-voltage issue is ruled out, then the problem lies with the LCD screen's backlight tubes, requiring repair.
**The screen displays nothing, but the indicator lights on the front panel are off.** Check if the signal cable connection between the vertical LCD advertising display and the computer is secure, and check the connector for broken or bent pins.
**The vertical LCD advertising display's resolution is low.** In most cases, this is a usage issue. First, check if the graphics card and monitor drivers are installed. Then, check according to the user manual whether the graphics card and LCD advertising display can achieve the required performance. If everything is normal, then the monitor is faulty and you will need to contact a repair technician.
If the LCD advertising machine doesn't respond when plugged in, open the back cover of the vertical LCD advertising machine using the key. Check if the dedicated power supply is on, and if any cables are loose or disconnected. Use a multimeter to check if the indicator lights are on. If the power supply is on, check if the decoder board has power, then check if the LCD advertising machine driver board has power, check if the high voltage is on, check if the speaker is working, and check if the LCD screen is powered. If any part is not powered, it means there is a problem with the LCD advertising machine. If it is, replace the LCD advertising machine parts immediately. The power supply is the most likely culprit, so call the LCD advertising machine manufacturer to send the dedicated power supply for the LCD advertising machine.
