Common faults and solutions of LCD video wall

Solutions to common internal faults (1) power failure and black screen can be caused by the failure of the built-in power supply. Treatment method: check whether the power output is normal. If the power output is not normal, it can be confirmed that the power supply is poor. If the power output is normal, it may be the problem of the drive board. (2) the flower screen is called the flower screen if there is no display or abnormal display in a certain area on the  LCD video wall. Treatment method: check whether the signal transmission line inserted on the liquid product screen is loose, resulting in poor contact. If so, plug the signal line tightly and fix it, and check

When playing advertisements, the LCD screen is on the black screen, dark screen, flashing screen, etc. it is called dark screen. Method: check that the power supply is normal. If the power supply output voltage is unstable (the voltage reaches V), it can be confirmed that the power supply is poor; If the power supply is normal, the drive board and inverter need to be replaced one by one until the fault is eliminated. When No. 1 is powered on, the words "no signal" appear on the screen, which is called no reason method: check the internal video line and input λ Check whether the 5V power line to the decoding board is loose. If there is no such phenomenon, replace the decoding board or the driving board. After replacement, check the cyclic playback of red, green, blue and other diagrams. It is often caused by the loose signal line or poor driving board. Method: adjust and replace the driving board

Common external faults and corresponding treatment methods when the machine has the above phenomena, first check whether the power plug, socket and wiring are loose and whether the switch (OSD key or remote control) is on. ② If the machine is equipped with a timer, it is necessary to check whether the red indicator light and green indicator light of the timer are on at the same time. If only the red indicator light is on and the green indicator light is not on, it may be a problem with the clock setting. Only the clock is correct. For details, please refer to the (operation manual) and the fault can be eliminated. ③ if the machine has a software timing function, check whether the clock setting in the software is correct. 2) there is image silence and check whether the sound is set to the minimum or mute mode, Reset the volume mode. If there is no sound in the offline state, first check whether the external sound cable is damaged and the connection is correct. If the document in the CF card is not established correctly, re-establish the loop document.