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FAQ and solutions of LED display


Fault Reason Solution
Whole screen no display a. No AC power supply. Check main power cable and reconnect it.
b. The computer isn't working Check the computer
c. Main data cable is broken. Reconnect the main data cable correctly or change a new one.
d. Control system is broken. Check indicators on sending card and receiving card, if red one keep lighting while green one blinking when the system is ok, otherwise use spare parts to replace.
e. Receiving card is no power. Check power cable between receiving card and power supply
f. Software setting is wrong. Correct the software setting to suit the control system.
Whole screen blinking. a. Ground wire is broken. Connect the ground wire between the computer and screen.
b. Control system is broken down. Change the control system.
c. Some signal of the data cable is lost. Examine the data cable, reconnect it correctly or change a new one.
d. Refresh rate setting is wrong Correct the Refresh rate setting
Module not work a. Unit module has no  power supply Voltage for unit module is 5V.
b. Flat cable between two modules is cut off. Change the flat cable.
c. 245 IC is broke down. Change new 245 IC
part of module works abnormally Signal of the part is wrong. Check the resistance near the 5026 IC which control that area.
Rows of module are not lighting Corresponding 4953 or 245 IC is not working. Examine the corresponding 4953 or 245 IC
Columns of module are not lighting Corresponding 5026 IC is not working Examine 5026IC or change a new one.
Dots out of control Pins or 5026 IC short connected Re-soldering the 5026IC or change a new one.
The display texts have shadows. Data cable or DVI cable connected incorrectly Reconnect main data cable or DVI cable between graphic card and sending card


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