Top ten common faults and emergency solutions of LED display

01.The display does not work, the sending card flashes green (for retractable)

1. Reason for failure:

1) The screen is not powered;

2) The network cable is not connected well;

3) The receiving card has no power supply or the power supply voltage is too low;

4) The sending card is broken;

5) The signal transmission intermediate device is connected or has a fault (such as: function card, fiber transceiver box);

2. Troubleshooting method:

1) Check that the screen power supply is well or not;

2) Check and reconnect the network cable;

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

4) Replace the sending card;

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

02. The display does not work, the sending card green light does not flash

1. Reason for failure:

1) The DVI or HDMI cable is not connected;

2) The copy or expansion mode in the graphics control panel is not set;

3) The software chooses to turn off the large screen power supply;

4) The sending card is not inserted or there is a problem with the sending card;

2. Troubleshooting method:

1) Check the DVI cable connector;

2) Reset the copy mode;

3) The software chooses to turn on the large screen power supply;

4) Re-insert the sending card or replace the sending card;

03. Prompt “Large screen system not found” at startup

1. Reason for failure:

1) The serial cable or USB cable is not connected to the sending card;

2) The computer COM or USB port is bad;

3) The serial cable or USB cable is broken;

4) The sending card is broken;

5) No USB driver 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 new software or install USB driver separately

04. The strips with the same height as the light board are not displayed or partially not displayed, lacking color

1. Reason for failure:

1) Flat cable or DVI cable (for submarine series) is not well contacted or disconnected;

2) There is a problem with the output of the former or the input of the latter at the junction

2. Troubleshooting method:

1) Re-insert or replace the cable;

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

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

1. Reason for failure:

1) Power protection or damage;

2) AC power cord is not in good contact

2. Troubleshooting method:

1) Check to confirm that the power supply is normal;

2) Reconnect the power cord

06. The entire cabinet is not displayed

1. Reason for failure:

1) The 220V power cable is not connected;

2) There is a problem with the transmission of the network cable;

3) The receiving card is damaged;

4) HUB board is inserted into the wrong position

2. Troubleshooting method:

1) Check the power cable;

2) Confirm the replacement of the network cable;

3) Replace the receiving card;

4) Reinsert HUB

07. The whole screen is blurred, the picture is moving

1. Reason for failure:

1) The driver loader is incorrect;

2) The network cable of the computer and screen is too long or of poor quality;

3) Sending card is bad

2. Troubleshooting method:

1) Re-load the receiving card file;

2) Reduce the length or replacement of the cable;

3) Replace the sending card

08. The entire display shows the same content for each display unit

1. Reason for failure:

No display connection file sent

2. Troubleshooting method:

Reset the send screen file, and connect the network cable of the computer connected to the output port of the sending card near the indicator light when sending.

09.The display brightness is very low and the displayed image is blurred.

1. Reason for failure:

1) Error in sending card program;

2) The function card is set incorrectly

2. Troubleshooting method:

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

2) Set the display monitor to have a minimum brightness value of 80 or higher;

10.Full screen shake or ghosting

1. Reason for failure:

1) Check the communication cable between the computer and the large screen;

2) Check the DVI cable of the multimedia card and the sending card;

3) Sending card is bad

2. Troubleshooting method:

1) Reinsert or replace the communication cable;

2) Push the DVI line into the reinforcement;

3) Replace the sending card.

Understand the top ten common faults and emergency solutions of LED displays, you don’t have to worry too much about the temporary failure of the display, because you can solve it completely.