LED Display Troubleshooting-Quick Solution

LED display has gradually become the mainstream product in the market. It can be seen everywhere in outdoor buildings, stages, stations and other places, but failures will inevitably occur during use. How to troubleshoot the LED display? Here comes the quick solutions for led display troubleshooting.

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

Cause of failure

Troubleshooting method

DVI or HDMI cable is not connected properly

check DVI line connector

The copy or expansion mode is not set in the graphics card control panel

Reset the replication mode

The software chose to turn off the large screen power supply

The software selects to turn on the large screen power supply

The sending card is not inserted in place or there is something wrong with the sending card

Reset the sending card or replace the sending card

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

Cause of failure

Troubleshooting method

there is no power supply for the screen body

check and confirm that the power supply of the screen is normal

The network cable is not connected well

Check the reconnection network cable

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

Ensure that the DC output power supply of the power supply is 5-5.2 V

The sending card is broken

Replace the sending card

Signal transmission intermediate equipment is connected or faulty (e.g. function card, optical fiber transceiver box)

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

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

Cause of failure

Troubleshooting method

 serial port line or USB line is not connected with sending card

confirm and connect the serial line

Computer COM or USB port is bad

Replace the computer

Serial port line or USB line is broken

Replace serial port line

The sending card is broken

Replace the sending card

USB driver is not installed

Install the new software or install the USB driver separately

4.The strip with the same height as the lamp board does not display or partially does not display, and lacks color

Cause of failure

Troubleshooting methods

Flat cable or DVI cable (suitable for submarine series) is not in good contact or disconnected

reinsert or replace the cable

The junction shows that there is something wrong with the former output or the latter input of the lamp board

First determine which display module is faulty and then replace it for maintenance

5.The whole cabinet is not displayed

Cause of failure

Troubleshooting method

220V power supply line is not connected properly

Check the power supply line

There is a problem with network cable transmission

onfirm the replacement of network cable

The receiving card is damaged

Replace the receiving card

HUB board insertion is misplaced

Re-insert HUB

6.Some modules (3-6 pieces) are not displayed

Cause of failure

Troubleshooting method

Power protection or damage

Detect and confirm that the power supply is normal

AC power cord contact is not good

Reconnect the power cord

led display troubleshooting 2

7.Flower points on the whole screen, and the shadow moves

Cause of failure

Troubleshooting method

incorrect driver loader

re-operate and load the receiving card file

The network cable of computer and screen is too long or of poor quality

Reduce the length of network cable or replace it

The sending card is broken

Replace the sending card

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

led display troubleshooting

Cause of failure: Display connection file was not sent.

Troubleshooting method: Reset the sending screen file, and plug the network cable connected to the computer in 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 unclear

Cause of failure: error in sending card program; The function card is not set correctly.

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

10. The whole screen shakes or ghosts

Cause of failure

Troubleshooting method

Check the communication line between the computer and the big screen

reinsert or replace the communication line

Check the DVI line between multimedia card and sending card

Reinsert the DVI line into the reinforcement

The sending card is broken

Replace the sending card

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