If the LED display fails, it will definitely cause trouble for people in the industry. But trouble is meant to be solved, but how to solve these problems?
Today, let’s learn about 10 ways to troubleshoot LED display problems.
The display does not work, and the green light of the sending card flashes (made into a retractable type)
- Cause of failure:
a. The screen is not powered;
b. The network cable is not connected properly;
c. The receiving card is not powered or the power supply voltage is too low;
d. The sending card is broken;
e. The signal transmission intermediate device is connected or has a fault (such as: function card, fiber optic transceiver box); - Troubleshooting methods:
1) Check and confirm that the screen is powered normally;
2) Check and reconnect the network cable;
3) Ensure that the DC output power supply of the power supply is 5-5.2V;
4) Replace the sending card;
5) Check the connection or replace the function card (fiber optic transceiver box);
The display screen does not work and the green light of the sending card does not flash
- Cause of the failure:
a. The DVI or HDMI cable is not connected properly;
b. The copy or expansion mode is not set in the graphics card control panel;
c. The software chooses to turn off the large screen power;
d. The sending card is not inserted in place or there is a problem with the sending card; - Troubleshooting methods:
1) Check the DVI cable connector;
2) Reset the copy mode;
3) The software chooses to turn on the large screen power;
4) Reinsert the sending card or replace the sending card;
When starting, it prompts “large screen system not found”
- Cause of the failure:
a. The serial port cable or USB cable is not connected to the sending card;
b. The computer COM or USB port is broken;
c. The serial port cable or USB cable is broken;
d. The sending card is broken;
e. The USB driver is not installed; - Troubleshooting methods:
1) Confirm and connect the serial port cable;
2) Replace the computer;
3) Replace the serial port cable;
4) Replace the sending card;
5) Install the new version of software or install the USB driver separately
The long strip with the same height as the light board does not display or partially does not display, or is missing color
- Cause of failure:
a. The flat cable or DVI cable (applicable to the submarine series) is not in good contact or disconnected;
b. There is a problem with the output of the former display light board or the input of the latter at the junction - Troubleshooting method:
1) Re-insert or replace the cable;
2) First determine which display module is faulty and then replace and repair
Some modules (3-6 modules) do not display
- Cause of failure:
a. Power protection or damage;
b. Poor contact of AC power cord - Troubleshooting method:
1) Detect and confirm that the power supply is normal;
2) Reconnect the power cord;
The entire box does not display
- Cause of failure:
a. The 220V power supply line is not connected properly;
b. There is a problem with the network cable transmission;
c. The receiving card is damaged;
d. The HUB board is misplaced - 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;
The whole screen is dotted, and the image is moving
- Cause of failure:
a. The driver loading program is wrong;
b. The network cable between the computer and the screen is too long or of poor quality;
c. The sending card is broken; - Troubleshooting method:
1) Re-operate to load the receiving card file;
2) Shorten the length of the network cable or replace it;
3) Replace the sending card;
Each display unit of the entire display screen displays the same content
- Cause of failure: No display connection file is sent;
- Troubleshooting method: Reset the sending connection file, and when sending, connect the computer’s network cable to the output port of the sending card near the indicator light
The brightness of the display screen is very low, and the displayed image is blurred
- Cause of failure:
a. The sending card program is wrong;
b. The function card setting is wrong - Troubleshooting method:
1) Restore the default settings of the sending card and save; 2) Set the minimum brightness value of the display monitoring to above 80;
The whole screen is shaking or ghosting
- Cause of failure:
a. Check the communication line between the computer and the large screen;
b. Check the DVI line between the multimedia card and the sending card;
c. The sending card is broken. - Troubleshooting methods:
1) Re-insert or replace the communication line;
2) Re-insert the DVI line to reinforce it;
3) Replace the sending card.
Knowing these ten common faults of LED display screens and emergency solutions, you don’t have to worry too much about temporary faults of the display screen, because you can completely solve them.