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what are Ten ways to repair a led screen display? | Enbon

2022/08/09

LED display failure is definitely in the industry to create trouble. But problems are meant to be solved, just how do you solve them?

Today with you to understand the LED display troubleshooting 10 methods.

One, The display screen does not work, and the green light of the sending card blinks (made of retract-release type).

1. Fault cause:

A. The screen body is not powered;

B. The network cable is not properly connected;

C. The receiving card has no power supply or the power supply voltage is too low;

D. The sending card is broken;

E. Signal transmission intermediate equipment is connected or faulty (such as function card, optical fiber transceiver box);

2. Troubleshooting method:

1) Check and confirm that the power supply of the screen body is normal;

2) Check that the network cable is reconnected;

3) Ensure that the DC output power supply is 5-5.2V;

4) Replace the sending card;

5) Check the connection or replace the function card (optical fiber transceiver box);


Two, The display screen does not work, and the green light of the sending card does not blink

1. Fault cause:

A. DVI or HDMI cable is not connected properly;

B. The replication or expansion mode is not set in the video card control panel.

C. The software turns off the power supply of the large screen.

D. The sending card is not properly inserted or the sending card is faulty;

2. Troubleshooting method:

1) Check DVI cable connector;

2) Reset the replication mode;

3) Select the software to turn on the power supply of large screen;

4) Reinsert or replace the sending card;


Three, Prompt "Large screen system is not be found" during startup

1. Fault cause:

A. The serial cable or USB cable is not connected to the sending card.

B. The COM or USB port of the computer is broken;

C. The serial cable or USB cable is damaged.

D. The sending card is bad.

E. The USB driver is not installed

2. Troubleshooting method:

1) Confirm and connect the serial cable;

2) Replace the computer;

3) Replace the serial cable;

4) Replace the sending card;

5) Install the new version of the software or install the USB driver separately


Four, The LAMP board IS equal to the height of the strip is not displayed or part is not displayed, lack of color

1. Fault cause:

A. Flat line or DVI line (suitable for submarine series) is not in good contact or disconnected;

B. There is a problem with the former output or the latter input of the junction light board;

2. Troubleshooting method:

1) Re-insert or change the cable;

2) First determine which display module is faulty and then replace and repair it

Five, part of the module (3-6 pieces) do not show

1. Fault cause:

A. Power protection or damage;

B. The AC power cable is not in good contact

2. Troubleshooting method:

1) Test and confirm that the power supply is normal;

2) Reconnect the power cable


Six, the whole box doesn't show

1. Fault cause:

A. The 220V power supply cable is not properly connected.

B. Network cable transmission is abnormal.

C. The receiving card is damaged;

D. The HUB board is inserted incorrectly

2. Troubleshooting method:

1) Check the power supply line;

2) Confirm the replacement of the network cable;

3) Change  the receiving card;

4) Reinstall the HUB card;


Seven, the whole screen becomes distorted

1. Fault cause:

A. The driver loader is incorrect;

B. The cable between the computer and the screen is too long or poor quality;

C. The sending card is faulty;

2. Troubleshooting method:

1) Reload the receiving card file;

2) Reduce the length of the network line or replace it;

3) Chnage the sending card


Eight, the whole display screen each display unit displays the same content

  1. 1. Fault cause:

  2. A. The display connection file is not sent;

2. Troubleshooting method: 

1) Reset the sending of the screen file, and insert the network cable connected to the computer at the outlet of the sending card near the indicator;


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

1. Fault cause:

A. Sending card program error;

B. The function card is not set correctly

2. Troubleshooting method:

1) Restore the default setting of the sending card and save it;

2) Set the minimum brightness value of the display screen to more than 80;

Ten, The whole screen shaking or double

1. Fault cause:

A. Check the communication cable between the computer and the large screen.

B. Check the DVI cable of the multimedia card and the sending card.

C. The sending card is faulty.

2. Troubleshooting method:

1) Re-insert or change the communication line;

2) Inserting and reinforcing DVI lines;

3) Change the sending card;


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