How to repair the problem of led advertising display ?

How to repair the problem of LED advertising display?

 

 

 

 

When the LED display brings amazing visual effects, it can't avoid some conventional problems, so how to solve these problems?

 

1. Preliminary examination and diagnosis
Power Check:
Confirm whether the power supply is normal, check whether the power cord is firmly plugged in, and whether the power switch is turned on.
Check that the fuse in the power box is blown and replace the fuse if necessary.
Source Check:
Confirm whether the input signal is normal, such as video source, computer signal, etc.
Check whether the signal cable connection is correct, and there is no loosening or short circuit.
Visual inspection of the display:
Check the surface of the display for damage, such as cracks, scratches, etc.
Check whether the display is installed smoothly to avoid display abnormalities caused by physical reasons.

 

2. Common faults and maintenance methods
Flower screen:
Check whether the power supply is abnormal, check whether the cable position is correct and loose, and if necessary, replug or clean the cable contacts.
Check whether the parameter settings of the control card are correct, and if there is any error, modify it to the correct value in time.
Check whether there is a short circuit or insufficient signal in the circuit of the signal output IC, and modify the circuit in time or seek professional maintenance.
Reinstall or update the graphics driver to resolve driver incompatibilities or setup issues.
Unit board does not light up or stays on:
Check the power supply of the unit board, if the power supply is abnormal, and repair the circuit.
Check whether the data cable is damaged, and replace it in time if it is damaged.
Check if the chip is damaged, if damaged, replace the chip.
The whole screen is not lit:
Check whether the power supply of the controller card is damaged, if it is damaged, replace it with a new one.
Check if there is a problem with the circuit and, if so, overhaul the circuit.
Check whether there is any problem with the computer setting data, and if so, re-debug.

Color Distortion:
Use professional software for color calibration and adjust the color parameters of the display.
Check whether the data cable is well connected and there is no damage or aging.
Replace the aging display controller.
Flickering:
Check whether the power supply voltage is stable and avoid flickering caused by voltage fluctuations.
Replace a good quality power cord to reduce interference.
Remove peripheral devices that may cause electromagnetic interference, such as high-power appliances.

 

3. Professional inspection and maintenance
Resistance Detection Method:
Use a multimeter to detect the resistance value of the circuit board and compare it to the normal value to determine the scope of the problem.
Voltage Detection Method:
Use a multimeter to detect the voltage value of the circuit and compare it to the normal value to determine the scope of the problem.
Short Circuit Detection Method:
In the case of circuit power failure, use a multimeter to detect whether there is a short circuit, and give priority to solving the problem after finding a short circuit.
Spare parts replacement:
For wearing parts such as LED modules, driver chips, etc., establish spare parts inventory and replace damaged parts in time.

 

4.The test and acceptance after maintenance
Functional Testing:
Test whether the functions of the display are normal, such as brightness, contrast, color, etc.
Stability Testing:
Run the display for a long time to see if there is any abnormality.
Acceptance:
Confirm whether the effect of the display after repair meets the requirements, and adjust it in time if there is any problem.