1. Image problem
After charging, the screen will automatically cycle red, green and blue images.
Method: loose signal wire or driver board.
2. Screen flowers
In an area, there is always no or abnormal flowers displayed on the LCD screen.
Method: Observe whether the signal transmission line on the LCD screen is inserted, such as separation phenomenon. It is caused by poor contact. In this case, insert the signal line and fix it, and check the problem to be solved; if there is no bad situation, it may be a problem with the LCD panel.
3. No display on the screen
The splicing screen is always in a black screen, and there is no picture, etc., it is a black screen.
Method: Check that the power output is normal. If the output voltage of the power supply is unstable (the voltage value does not reach 11), you can confirm the power. If the output power is normal, you need to replace the driver board and inverter until the fault is eliminated.
4. No signal
Method: Check whether the internal video circuit and input to the 5 power line decoder board are loose. If there is no such phenomenon, you need to replace the decoder board or driver board. After replacement, check whether the fault disappears.
5. Black screen
It may be that the built-in power supply is broken.
Method: Check that the power output is positive. If the power output has no output, it is a confirmation power. If the output power is normal, it may be a problem with the driver board.
