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10 ways to troubleshoot LED display

Sep. 05, 2021

10 ways to troubleshoot LED display

 

 If the LED display fails, it will definitely cause trouble to the users.Today, let’s learn about 10 ways to troubleshoot LED displays.

p2 led display.jpg

1. The display does not work, and the green light of the sending card flashes

  1. Failure reason:

  1) The screen is not connected well to the power;

  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, optical fiber transceiver box);

   2. Troubleshooting method:

   1) Check that the power of the screen body and make sure it is normal;

   2) Check and reconnect the network cable;

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

  4) Replace the sending card;

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

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

   1. Failure reason:

   1) DVI or HDMI cable is not connected well;

   2) There is no setting for copy or extend mode in the graphics card control panel;

  3) The software has chosen to turn off the power of the large screen;

  4) The sending card is not inserted in place 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 power of the large screen;

  4) Reinsert the sending card or replace the sending card;

   3. It prompts "the big screen system is not found" when starting up

   1. Failure reason:

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

   2) The computer COM or USB port is broken;

   3) The serial port or USB cable is broken;

  4) The sending card is broken;

  5) USB driver is not installed

   2. Troubleshooting method:

   1) Confirm and connect the serial port cable;

  2) Replace the computer;

  3) Replace the serial port line;

  4) Replace the sending card;

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

  Four. The strips of the same height as the light board are not displayed or part of them are not displayed, lack of color

  1. Cause of failure:

  1) The flat ribbon cable or DVI cable (for submarine series) is not in contact or disconnected;

  2) At the junction, the former output or the latter input is faulty.

  2. Troubleshooting method:

  1) Re-plug or replace the cable;

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

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

  1. Cause of failure:

  1) Power protection or damage;

   2) The AC power cord is in poor contact

  2. Troubleshooting method:

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

  2) Reconnect the power cord

   Six, the whole box is not displayed

  1. Cause of failure:

  1) The 220V power supply line is not connected properly;

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

  3) The receiving card is damaged;

  4) The HUB board is inserted misplaced

  2. Troubleshooting method:

   1) Check the power supply line;

   2) Confirm to replace the network cable;

  3) Replace the receiving card;

  4) Re-insert the HUB

   Seven, full screen dots, picture and shadow buttons

  1. Cause of failure:

  1) The driver loader is wrong;

  2) The network cable between the computer and the screen is too long or the quality is not good;

  3) Sending card is broken

  2. Troubleshooting method:

  1) Re-operate to load the receiving card file;

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

  3) Replace the sending card

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

  1. Cause of failure:

   The display connection file was not sent

  2. Troubleshooting method:

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

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

  1. Cause of failure:

  1) Sending card program error;

   2) The function card is set incorrectly

  2. Troubleshooting method:

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

   2) Set the minimum brightness value of the display monitor to be above 80;

  10, the whole screen is shaking or ghosting

  1. Cause of failure:

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

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

  3) The sending card is broken.

  2. Troubleshooting method:

   1) Re-plug or replace the communication line;

  2) Punch and reinforce the DVI cable;

  3) Replace the sending card.

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


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