Do You Know How to Solve These LED Display Failures?

Publisher: Supplier of LED Display Time: 2018-11-23 Views: 2763

The LED display is faulty, do you know how to solve it? The following editor will tell you about the solutions to common failures of LED displays.

1. The display screen does not work, the green light of the sending card flashes (made into a retractable type)


Causes of failure: the screen is not powered; the network cable is not connected well; the receiving card has no power supply or the power supply voltage is too low; the sending card is broken; the signal transmission intermediate equipment is connected or faulty (such as: function card, optical fiber transceiver box).


Troubleshooting method: Check and confirm that the power supply of the screen is normal; check and reconnect the network cable; ensure that the DC output power supply of the power supply is 5-5.2V; replace the sending card; check the connection or replace the function card (optical fiber transceiver box).



2. The display screen does not work, and the green light of the sending card does not flash


Cause of failure: DVI or HDMI cable is not connected properly; copy or expansion mode is not set in the graphics card control panel; the software has chosen to turn off the power of the large screen; the sending card is not inserted in place or there is a problem with the sending card.


Troubleshooting method: Check the DVI cable connector; reset the copy mode; software selects to turn on the power of the large screen; re-insert the sending card or replace the sending card.


3. Prompt "big screen system not found" when starting


The reason for the failure: the serial port cable or USB cable is not connected with the sending card; the COM or USB port of the computer is broken; the serial port cable or USB cable is broken; the sending card is broken; the USB driver is not installed.


Troubleshooting method: confirm and connect the serial cable; replace the computer; replace the serial cable; replace the sending card; install the new version of the software or install the USB driver separately.


4. The strip with the same height as the light board does not display or partially does not display, lack of color


The cause of the failure: the flat cable or DVI cable (applicable to the submarine series) is not in good contact or disconnected; the junction shows that there is a problem with the output of the former or the input of the latter.


Troubleshooting method: re-plug or replace the cable; first determine which display module is faulty and then replace it for maintenance.


5. Some modules (3-6 blocks) are not displayed


Cause of failure: power protection or damage; poor contact of AC power line.


Troubleshooting method: Check and confirm that the power supply is normal; reconnect the power cord.


6. The whole box is not displayed


The reason for the failure: the 220V power supply line is not properly connected; there is a problem with the transmission of the network cable; the receiving card is damaged; the HUB board is inserted in the wrong place.


Troubleshooting method: check the power supply cable; confirm the replacement of the network cable; replace the receiving card; re-insert the HUB.


7. The whole screen is full of flowers, pictures and shadows are moved


Cause of failure: wrong driver loader; too long or poor quality network cable between computer and screen; bad sending card.


Troubleshooting method: re-operate and load the receiving card file; shorten the length of the network cable or replace it; replace the sending card.


8. Each display unit of the entire display screen displays the same content


Cause of failure: The display screen connection file was not sent.


Troubleshooting method: reset the sending screen file, and insert the network cable connecting the computer to the output port of the sending card near the indicator light when sending.


9. The brightness of the display screen is very low, and the displayed image is blurred


Cause of failure: The sending card program is wrong; the function card setting is incorrect.


Troubleshooting method: restore the default setting of the sending card and save it; set the minimum brightness value of the display monitor to be above 80.


10. The whole screen is shaken or ghosted


Cause of failure: Check the communication line between the computer and the large screen; check the DVI line between the multimedia card and the sending card; the sending card is broken.


 Troubleshooting method: re-insert or replace the communication cable; punch and insert the DVI cable for reinforcement; replace the sending card.


After understanding the common faults and emergency solutions of these ten LED display screens, you don't have to worry too much about the temporary faults of the display screen, because you can solve them completely.